What Are the Best Muscle Recovery Foods?

Wondering what muscle recovery foods are good for prevention and relief of delayed onset muscle soreness? This comprehensive list of foods full of healthy fats, amino acids, and natural sugars will support your workout and recovery goals.

After starting a new workout, you’re in for some growing pains. Delayed onset muscle soreness or DOMS can affect anyone, from those new to working out to elite athletes incorporating different exercises into their routines. Whenever you push your muscles, either with unfamiliar exercises or longer durations, you’re creating microscopic tears to the muscles, which then cause stiffness, soreness, and pain. Are sore muscles a good sign? Yes, in a sense, because it means you’re using your muscles in new ways that will eventually lead to a better fitness profile. But don’t fret! Eating muscle recovery foods can help ease the discomfort and may even help decrease muscle soreness in the first place.

Using food as your method of recovery and prevention may truly be the best road to take. The other suggestions to help muscle recovery either take extra time or come with other risks, and none of them can get in front of DOMS before it starts. Getting a massage after every workout would be great, but do you have the time, the money? Rest and ice packs are perfectly reasonable options too, but it’s the rest that might bother you if you’re really excited about a new workout and seeing results. Do you really want to take a couple of days off after every workout to let your muscles recover? It might not be a bad idea, but with the right foods pre- and post-workout, it might not be necessary either.

The last refuge to treat the ache and pain of muscle soreness is to use painkillers. Whether it’s over the counter fare you’d take for any pains (a wincing headache for example, or to relieve menstrual cramps), or prescription painkillers meant for more serious pains (a wrenched back or dental surgery). And these pain killers come with health-compromising side effects that are best avoided.

So what can you eat that will make a difference? Here are some foods you might want to include on the menu on gym days.

 Muscle recovery foods for prevention and relief.

Muscle Recovery Foods

Whether for their protein content, iron content, anti-inflammatory properties, or amino acids, these foods can help your muscles heal faster.

Cottage Cheese

Cottage cheese has around 27 grams of protein per cup, and is often a regular food in the fitness community for those without any dietary restrictions surrounding milk products. In fact, the casein protein found in cottage cheese curds (as opposed to the whey protein found in watery milk) are often isolated and used as a workout protein supplement. As a slow-digesting protein, casein can help build and rebuild muscle while you sleep if it’s your last snack before bed.

The essential amino acid leucine is also present in cottage cheese, and comprises around 23% of the essential amino acids in muscle protein (the most abundant percentage of them all). Foods with leucine can help you build muscle by activating protein synthesis, and the faster you rebuild your muscle, the faster your muscle repair and workout recovery!

Eat it plain, or combine cottage cheese with some of the other recovery foods on this list to stack the benefits. Cottage cheese can even be used in baked goods and pancakes or included in protein shakes—don’t be afraid to get creative.

Sweet Potatoes

Adding sweet potatoes to your post-workout meal can help replenish your glycogen stores after a tough workout. Sweet potatoes are a great source of vitamin C and beta-carotene as well, and are loaded with fiber which helps to control appetite and maintain healthy digestion and build muscle.

Sweet potatoes can be baked whole in the oven or on a grill, cut into fries, spiced with cinnamon, or made savory with garlic powder and pepper. Enjoy them at the dinner table or on the go: a baked potato wrapped in foil can join you just about anywhere.

Baking Spices

Speaking of what you can put on sweet potatoes, it turns out some baking spices are good for post-workout recovery as well. Not so much in the form of gingerbread cookies or cinnamon rolls, but a study showed that cinnamon or ginger given to 60 trained young women (between the ages of 13 and 25) significantly reduced their muscle soreness post-exercise. If you’re already having a sweet potato, make it a little sweeter with some cinnamon, add it to oatmeal, or put some in your coffee for the extra boost.

Coffee

Did we just mention coffee? Good news: coffee’s on the list too. Research suggests that about 2 cups of caffeinated coffee can reduce post-workout pain by 48%, and another study showed that pairing caffeine with painkilling pharmaceuticals resulted in a 40% reduction of the drugs taken. If you do need pharmaceutical pain relief, maybe coffee can help you minimize just how much you take—caffeine is a much less dangerous stimulant than pain pills.

Turmeric

Another spice on the list, turmeric contains the compound curcumin, which is an anti-inflammatory and an antioxidant, and has been shown to be a proven and reliable pain reliever. Whether it’s helping you with delayed onset muscle soreness or pain from an injury (workout-related or otherwise), turmeric eases both pain and swelling by blocking chemical pain messengers and pro-inflammatory enzymes.

As with the other spices, it can be easily added to baked goods, to coffee, and to oatmeal. With its beautiful golden color, you can even make what’s called “golden milk” or a turmeric latte by combining 2 cups of warm cow’s or almond milk with 1 teaspoon of turmeric and another teaspoon of ginger, and then sip your muscle soreness away.

Oatmeal

Speaking of oatmeal (and isn’t it nice that so many of these ingredients can be easily combined?), it, too, can help relieve muscle soreness. This complex carb gives you a slow and steady release of sugar, along with iron needed to carry oxygen through your blood, and vitamin B1 (thiamin), which can reduce stress and improve alertness. This is why oatmeal is a great way to start the day, but since it also includes selenium, a mineral that protects cells from free-radical damage and lowers the potential for joint inflammation, it’s a great food for those in high-intensity workout training as well (like, up to Olympic level training).

Use oatmeal as a daily vehicle for other healthy ingredients, including the spices on this list, and enjoy its reliable benefits.

Bananas

Easily sliced into oatmeal, included in smoothies, or eaten alone, not only are bananas a healthy way to replace sweets (frozen and blended they can even make a delicious ice cream alternative), bananas are also a great way to get much-needed potassium. Research suggests potassium helps reduce muscle soreness and muscle cramps like the dreaded “Charley horse” spasm that contracts your muscle against your will and might not let up until it causes enough damage to last for days. A banana a day could keep the Charley horse away, and is particularly delicious (and helpful) when paired with its classic mate: peanut butter.

Peanut Butter

The healthy fats and protein found in nut butters like peanut or almond butter can help repair sore muscles. A reliable source of protein for muscle building, with fiber for blood pressure aid, vitamin E for antioxidant properties, and phytosterols for heart health, peanut butter offers up a ton of benefit and is easy to eat anywhere. Make a sandwich, use it to help bind together portable protein balls filled with other ingredients, add it into smoothies, or just eat it from the jar with a spoon (no one’s judging).

Nuts and Seeds

If you’re a fan of protein balls, then you’re well acquainted with nuts and seeds, which are great additions to these protein-rich foods. While providing essential omega-3 fatty acids to fight inflammation, various nuts and seeds can provide you protein for muscle protein synthesis, electrolytes for hydration, and zinc for an immune system boost. Something as simple as a baggie full of almonds, walnuts, pumpkin, and cashews can help maximize your muscles. Mixing in seeds (sunflower, chia, pumpkin) adds a healthy density that can curb your hunger and satisfy your appetite for longer. They’re small but powerful assets in quick muscle recovery.

Manuka Honey

This is not your grocery store honey in its little bear- or hive-shaped bottle. Manuka honey comes from the Manuka bush in New Zealand, with a milder flavor than that of bee honey and a much thicker texture. It’s anti-inflammatory and rich in the carbs needed to replenish glycogen stores and deliver protein to your muscles. Drizzle it over yogurt or stir it into tea to gain its benefits.

Green Tea

Green tea is particularly helpful for muscle recovery purposes. With anti-inflammatory antioxidants, it makes an excellent pre- or post-workout drink to prevent muscle damage related to exercise, and also helps you stay hydrated.

Cacao

Cacao has high levels of magnesium, antioxidants, and B-vitamins, which reduce exercise stress, balance electrolytes, and boost immunity and energy levels. The antioxidant flavanols in cacao also help up the production of nitric oxide in your body, which allows your blood vessel walls to relax, lowering blood pressure and promoting healthy blood flow. Adding cacao powder to your high-quality protein shakes or a glass of cow/almond/coconut milk post-workout will bring you its benefits.

Tart Cherries

Tart cherry juice has been shown to minimize post-run muscle pain, reduce muscle damage, and improve recovery time in professional athletes like lifters, according to the Journal of the International Society of Sports Nutrition. Enjoy tart cherry juice as a drink, or include the dried fruit as a part of your own muscle-building trail mix with the nuts and seeds discussed above. It’s not the only fruit or fruit juice you might include either. The nutrients in fruits like oranges, pineapples, and raspberries can also help speed up your recovery.

Salmon

Rich with anti-inflammatory omega-3 fats, muscle-building protein, and antioxidants, salmon is an extremely efficient post-workout food. Not an option if you are vegan or vegetarian, of course, but for the meat eaters among us, or those on the Paleo diet, salmon can specifically help prevent delayed onset muscle soreness, reduce inflammation, and provide you with an abundance of the protein needed for muscle growth. Eat this protein within 45 minutes after working out for maximum effect, either grilled, cooked up in salmon cakes, or raw in the form of sushi or sashimi. All of the above goes for tuna as well, by the way—reasons you might become a pescatarian.

Eggs

If you are an omnivore or ovo-vegetarian, eggs are great way to gain protein first thing in the morning, and an even more effective food to have immediately post-workout to help prevent DOMS. Like cottage cheese, eggs are a rich provider of leucine, and like salmon, eggs contain vitamin D (in their yolks). For your convenience, eggs can be boiled and brought along for immediate consumption after your training. Boil a dozen at the start of each week during your meal prep, and have an easy protein source in the palm of your hand every other day of the week.

Spinach

Did we really get all the way to the end of the list without a vegetable? So sorry! Let’s fix that with spinach. A powerhouse of antioxidants, not only can spinach help prevent diseases like heart disease and various cancers, but it also helps you recover quickly from intense exercise. Spinach’s nitrates help to strengthen your muscles, and its magnesium content helps maintain nerve function. Spinach helps to regulate your blood sugar (in case you worry about the spikes you might get from the sweeter items on this list), and can be added to many dinners, snuck into smoothies, or eaten on its own either raw or sautéed in olive oil.

Resist Damage and Recovery Quickly

These foods help with recovery from DOMS and reduce the amount of soreness you get in the first place by providing your body with the proteins and nutrients it craves when you’re working out to the best of your ability.

A quick note before you go. In your quest for pain-free muscles, you’ll want to avoid:

  • Refined sugar: Just one sugary soda a day can increase your inflammatory markers, as can white bread and other products with refined sugar. Natural sugars don’t bring that kind of adverse effect, so get your sugar from whole foods instead.
  • Alcohol: The dehydration caused by alcohol requires its own special recovery, and will deplete many of your vitamins (especially B vitamins). Some research suggests that alcohol can interfere with how your body breaks down lactic acid, which would increase muscle soreness. If you’re on a mission to build muscle, it’s best to avoid alcohol.

If you’re eating pretty well and avoiding what you shouldn’t eat, but still find muscle soreness a burden after working out, there is always the option to supplement.

What is the best supplement for muscle recovery? Evidence shows that getting all your body’s essential amino acids in balance will help specifically with muscle sprains and pulls, so when supplementing, just make sure you cover the waterfront (rather than choosing one or two essentials and neglecting the rest). Other than that, a diverse diet can be had in choosing natural preventions and remedies for healthy muscle recovery.

Do Avocados Have Protein?

Avocados and protein: how much protein do they contain, what else is in an avocado, and is it healthy for you? Find out!

It’s true: plant-based foods, including vegetables and fruits, contain protein. A vegetable with any more than 2 grams of protein is actually considered a high-protein vegetable, though they’ll always score lower than beans, just as beans score lower than meats. Of course, regardless of how an avocado is prepared or how green it can be, the avocado is actually a fruit, with a seed at its center. In fact, more specifically it’s classified as a single-seeded berry. So the short answer to the question, “Do avocados have protein?” is… yes! Avocados do contain protein, and to find out how much, which other fruits have protein, and how you can eat more avocados creatively, read on.

Fruits Containing Protein

The best dietary sources of protein will always be meat, followed by some beans, legumes, and dairy. For example, excellent sources of protein are chicken, turkey, fish and other seafoods, lentils, cottage cheese, and eggs. Other good sources of protein are nuts, nut butters, seeds, milk, green peas, and edamame, but it’s a sharp fall after that.

To be considered a good source of protein, a food should contain over 6 grams of protein, so none of the following fruits contains a significant amount of protein, but that doesn’t mean they don’t contain some protein for your body to use. Here are fruits high in protein, with how much content they have listed in grams per cup, from high to low.

  • Guavas: 4.2 grams of protein per cup (165 g)
  • Avocados: 4 grams of protein per avocado (201 g)
  • Apricots: 2.2 grams of protein per cup (155 g)
  • Kiwifruit: 2.1 grams of protein per cup (180 g)
  • Blackberries: 2 grams of protein per cup (144 g)
  • Oranges: 1.7 grams of protein per cup (180 g)
  • Bananas: 1.3 grams of protein per cup sliced (118 g)
  • Cantaloupe: 1.5 grams of protein per cup (177 g)
  • Raspberries: 1.5 grams of protein per cup (123 g)
  • Peaches: 1.4 grams of protein per cup (154 g)

So, while protein is easily found in animal-based foods, plant-based foods including fruits can provide it as well. Making sure there is a variety of food in your diet and establishing a balanced and healthy eating routine ensures that you’re more likely to get your daily recommended vitamins and minerals. As far as fruits, avocado is only barely beaten by guava in protein content, so it’s not to be counted out.

Do avocados have protein? Find out here

Do Avocados Have Protein That’s Good for You?

Avocados were originally called ahuakatl in the Aztec’s Nahuatl language, a word that meant testicle, referring to the food’s shape. American farmers in California later chose “avocado” to better market the fruit, but only after the original marketing idea of calling it an “alligator pear” didn’t catch on.

Avocados are best known for their healthy fat reputation, but are they healthy in other aspects? Well, it might be interesting to find out that avocados contain a fungicidal toxin that is not injurious or harmful to humans but is potentially poisonous to most animals. Basically, don’t feed any avocado or guacamole to horses, cows, goats, sheep, pigs, rabbits, birds, or fish.

So we humans can eat avocados, but should we, especially for its protein content?

Well, we’ve established that fruits and veggies don’t have a huge amount of protein, and so don’t work so well as a protein replacement.

However, protein does provide amino acids important for building both muscle and body tissue. Along with helping to maintain tissue health, the protein gained from avocados also serves to boost your immune system. Not only that, eating avocados helps you feel more full when you pair your avocado protein intake with other high-protein foods. You’ll appreciate increased satiety and satisfaction that curbs your appetite, which can help with weight loss if that’s your aim. With the protein in avocados, you have plenty of health benefits to gain and nothing to lose.

What Else Is in Avocados?

Besides healthy fats and protein, avocados also contain iron, zinc, potassium, and vitamin E.

Of the two types of avocados that are abundant in the United States (those being Florida and California-grown avocados), the California avocados have darker skin and are richer in taste than the bright green-skinned Florida variety, which have a milder taste. While both have the same amount of valuable fats, the Florida variety is lower in both protein and carbohydrates (which may be a plus or a minus depending on your dietary needs).

The Carbs in Avocados

The energy in avocados primarily comes from their fat content, but avocados do have a fair helping of carbs, specifically about 3 grams of carbohydrates in a 1-ounce serving of California avocados, while it’s closer to 2 grams of carbs in Florida ones. The small amount of sugar in avocados, which is a simple carb, is also slightly higher in California avocados, but nevertheless for both varieties the amount is still less than 1 gram per serving.

The Fiber from Avocados

The above carb content is largely derived from the dietary fiber that avocados have, which is another beneficial contribution from this food. Fiber keeps your digestive system working comfortably, and has been shown to help fight cardiovascular disease. One serving of either kind of avocado produced in the United States offers 2 grams of fiber, which in the body also helps to control blood sugar levels and lower cholesterol levels.

What Science Says About Avocados

The health benefits of avocados have been an area of interest for nutrition researchers. A survey published in Nutrition Journal stated that consuming avocados is associated with a better quality diet and nutrient intake, as well as lower metabolic syndrome in adults in the United States. They also advised that dietitians consider recommending avocado consumption to their patients and clients.

A study on Hass avocados (which originate from California) found that avocado oil helps promote healthy blood lipid profiles and enhances the bioavailability of the fat soluble vitamins obtained from other fruits and vegetables. Researchers highlighted that clinical studies show avocado consumption is associated with cardiovascular health, healthy aging, and proper weight management.

Avocado health benefits work on the inside and the outside. The avocado can be used as a natural cosmetic due to its rapid skin penetration and superior quality as a natural sunscreen. It turns out, the avocado is one of the healthiest things you can put in and on your body.

Ways to Include Avocado in Your Diet

Avocados feature very prominently in vegan and vegetarian diets, where any amount of extra protein is always welcome to help make up for the loss of protein gained from animal meats. If you’re only using avocados in guacamole, you are missing out on a world of new opportunities, especially if you or someone you know needs to make a new and healthier change in their diet from processed food to natural whole foods.

Its creamy texture makes it perfect for a healthy smoothie full of spinach and protein powder. You can also use avocados to make vegan ice cream, cookies, truffles, creme brûlée, or chocolate and peanut butter pudding. If you’re creating a diet that helps someone with diabetes stay off sugary snacks, avocado-based desserts could be a great way to give them a sweet treat without doing them any harm.

You could mash up a fresh avocado and use it as a spread to replace butter (it’s buttery in taste anyway!). Want to make green eggs and ham? Take that healthy avocado mash and combine it with your eggs before scrambling them, and not only do you get a fun color, but you also get a much denser, more balanced breakfast with heightened flavor and texture.

Pro Protein, Pro Avocado

Now that you know avocados are protein packed, consider all the creative ways you can make the avocado a more regular part of your diet if you want to gain all those healthy benefits. Surprise yourself and your loved ones!

L- vs. D-Amino Acids

The difference between L- vs. D-amino acids: explore the structure of these important building blocks of human life, their definitions, their similarities, their distinctions, and their uses within the body.

Of the 20 common amino acids in the human body that build our proteins, each of them (except for glycine) occur in two isomeric forms: L-forms and D-forms. This means that the same components of the molecules can be arranged in two different orders, a tad like how a palindrome is the same word backwards as forwards (like “radar” and “kayak”). Actually with L- vs. D-amino acids, it’s more like the playful term for a word that backwards becomes a different word, a “Semordnilap” (which is “palindromes” spelled backwards). As Oprah Winfrey named her company Harpo Studios, or the town of Retsof, New York, was named for salt mine owner William Foster. Wolf vs. flow, room vs. moor, star vs. rats: the same letters, arranged exactly backwards, that then come to hold a whole new meaning. That is the basic difference between L- and D-form amino acids. The rest of this article will provide more detail and context.

What Do the L and the D Stand For?

It’s easy to assume that if something is called L-form, that must mean it’s in the form of an L, like a sectional sofa, or that D-form would refer to a half-moon shape, like a semi-circular booth in a restaurant, but that’s not what those letters stand for here. In this context, the L and the D are referring to the order the side chain structures attach to an amino acid’s central carbon atom (also known as the chiral carbon or alpha carbon). Those groups are: a single hydrogen atom (H); a carboxyl group (or COOH group); an amine group (or NH2 group); and the distinguishing R group which mostly differentiates one amino acid from another.

Picture a pair of pinwheels with four color petals (the four functional groups) attached to the centers (the alpha carbon or chiral molecules). The L-form’s colors follow the alphabet and go blue, green, red, yellow if your eyes read it like a clock; your eyes read clockwise, while the wheel spins counterclockwise. The D-form goes the opposite way: to read it in the order of blue, green, red, then yellow, D-form will have to spin clockwise, while you read it backwards, eyes traveling in the counterclockwise direction.

“L” Stands for “Levorotation”

In order for your eyes to read the amino acid correctly (in alphabetical color order) the molecule itself must rotate counterclockwise, or to the left. Levorotation refers specifically to that counterclockwise rotation.

“D” Stands for “Dextrorotation”

In order for your eyes to read the amino acid in alphabetical color order, the molecule must spin clockwise, or to the right. The prefix of dextrorotation comes from the Latin, dextro, meaning “to the right.” Your right hand is your dexterous one, and the left hand in the Latin would be your sinister one (many apologies to the left-handed among us; like right-handed writing desks and scissors weren’t enough, you are also designated sinister as well).

How to Remember Which Is Which

If you know you’re not going to remember the Latin, just remember this:

  • L stands for left-moving: The molecule rotates left so you can read its structure forward, towards the right.
  • D stands for your dextrous right hand: The molecule spins right so that you’re reading its structure counterclockwise, backwards towards the left.

L- vs. D-Amino Acids: What Do They Do?

This section will attempt to clarify the properties of L- and D-form amino acids, what makes them different, and what they have in common.

The difference between L- vs. D-amino acids.

L-Amino Acids

L-amino acids are the molecules used to produce proteins in the human body and are divided into nonessential amino acids and essential amino acids (which we must get from consuming our food). In fact, L-amino acids occur in all proteins made by animals (including humans), plants, bacteria, and fungi. They serve as both hormones and enzymes, regulating the functions in the body. L-amino acids are also the ones that can be produced by lightning reactions, possibly the origin of the organic compounds of life on Earth, and the building blocks of our proteins.

D-Amino Acids

The D-forms of amino acids are mirror images of the L-form amino acids. D-amino acids are not incorporated into proteins; however, D-serine acts as a neurotransmitter in the brain. Some D-amino acids can be found in bacterial cell walls, but again, not in bacterial proteins.

The Similarity

They are each one of the two forms that amino acids can take in nature. Normal chemical synthesis of amino acids always creates a racemic mixture, which is a mixture of equal parts L- and D-amino acids. They are mirror images of one another, and each contain a central carbon atom, a hydrogen atom, a carboxylic acid group, an amine group, and an R group carbon chain. They are like identical twins born to be the reverse of one another, as in this real case of twin boys who were nearly conjoined, but instead were born with their livers, hearts, and spleens on opposite corresponding sides of their bodies. That means one twin has a condition called dextrocardia, where his heart points towards the dextrous or right side of his body, instead of the left side. They are identical, but with opposite features, as in one of the boys is right-handed, and the other, left-handed. (Interestingly enough, there is a chance that as many as a quarter of all identical twins could be mirror twins.)

The Difference

The main difference between these two formations is the location of the amine group in their structure, which designates how the amino acid will be used. L-amino acids are used in protein synthesis, while D-amino acids are not. L-aminos rotate counterclockwise or left in a process known as levorotation, while D-amino acids rotate clockwise to the right, in what’s known as dextrorotation. Usage-wise, L-amino acids are used to produce proteins, making them vitally important to our healthy functioning, while D-amino acids are found instead in the cell walls of bacteria.

Conclusion: L vs. D

Hopefully the explanation and comparison of the L- and D-form amino acids has enlightened the subject and shown you their similarities and their differences: less like dexter vs. sinister, and more like brother-to-brother twins.

Foods That Are High in Arginine

Arginine is a conditionally essential amino acid that helps support cardiovascular health, improves kidney function, and boosts the immune system. Explore its many functions, as well as which foods are good sources for arginine if you’re looking to give your body a stronger supply.

Arginine (also called L-arginine) is a conditionally essential amino acid that helps support cardiovascular health, improves kidney function, and boosts the immune system. Amino acids are the building blocks of proteins in our bodies. Essential amino acids must come from our food sources or from ingesting a supplement, but conditionally or semi-essential amino acids are on the edge. Arginine, for example, is essential during our early years of childhood growth, but is usually nonessential in normally functioning healthy adults. However, because arginine is so valuable for so many processes in the body, foods high in arginine can help shore up your stores, and may be even more important in certain medical circumstances.

This article will explore what arginine does in the human body, who could use more of it, and which foods are good sources for arginine if you’re looking to give your body a stronger supply.

Arginine: Its Role in the Body

Here are some of the health benefits that might result from an extra intake of arginine. Research is still being conducted on this amino acid and how supplementing or concentrating it might help treat certain conditions, and so far the results look promising.

Blood and Heart Health

Arginine supplements are used to treat conditions such as excessive inflammation and chronic migraines. Arginine creates nitric oxide, which relaxes our blood vessels, improves blood flow, and therefore brings cardiovascular aid for certain people and conditions. For example, those with peripheral arterial disease, angina, heart disease, and even erectile dysfunction can find benefit from increased arginine. Arginine is also associated with shortening post-surgery recovery time and helps heal injuries.

The Immune System

Studies are beginning to show arginine’s immune-boosting effects, particularly with modulating some symptoms of herpes (flare-ups) and HIV (excessive weight loss), and there have even been correlations shown between low circulating arginine and cases of trauma and cancer. Though more research is needed, it’s a valuable discovery to know that arginine is often missing when the body is experiencing traumatic events.

Kidney Functioning

Not only is arginine helpful in assisting kidney function after transplantation, but it also appears to reduce kidney inflammation. Arginine is often studied in relation to kidney functioning to try to isolate which conditions it helps best and whether or not there’s any potential harm from enhanced levels of arginine. As a natural player on the body’s chemical stage, it’s a particularly safe facet to explore.

The Research Continues

Arginine has been studied in the contexts of helping diabetes, obesity, male fertility, hypertension, dementia, and cancer, and the research goes on still. Scientists and doctors work to pinpoint the best application of arginine treatment and to better define its powers of influence. As a naturally created amino acid that helps us grow and keeps our bodies functioning, it’s a promising reserve for testing.

Foods High in Arginine

Short of supplementation, you can always get arginine from certain natural food sources. So which foods are arginine foods, and are they easy to incorporate in your diet? Short answer to that last question: yes, these arginine-rich foods will be easy to find and to eat (you’ve surely tried a few if not all of them already). As for which foods you should eat more of if you want to up your arginine content? Take a look at the list of foods below and start thinking about which ones you’d like to incorporate into your diet as well as your dietary intake.

Foods high in the amino acid arginine.

Turkey

Since arginine is derived in the body from protein, any high-protein food will help, but turkey breast in particular has such a substantial amount of arginine that it’s considered the best source around. With a high amount of omega-3 fatty acids and B vitamins to boot, one cooked turkey breast provides 16 grams of arginine.

Sunflower Seeds

Seeds and nuts have a fair amount of arginine, with sunflower and sesame seeds both contributing 2.4 grams of arginine per 100 grams of seeds. While they’re a tad low in arginine, they definitely make up in balance by providing a high amount of the essential amino acid lysine along with your arginine intake, so you don’t run the risk of overbalancing. Lysine helps absorb any excess of arginine, and will act as a check on keeping your amount of arginine within its optimal healthy levels.

Pork Loin

Another high-protein food, and with it comes another high contribution to your arginine content. Pork loin is one of the leaner cuts of pork you can get, so you’re not sacrificing one aspect of your health to favor another (balance is always key). Pork loin has 14 grams of arginine per rib, just second under the above-listed turkey breast.

Pumpkin Seeds

What did we say above about seeds, that some aren’t that impressive in the arginine department? Well, here’s an even better option then: a cup of pumpkin seeds can give you nearly 7 grams of arginine, as well as the minerals zinc and iron. Pumpkin seeds are easy to snack on and a great arginine-rich food for vegans or vegetarians who don’t eat animal products. Plus, they’re trail-mix-worthy and can be flavored sweet or salty depending on your taste.

Chicken

Chicken is a staple of a diet rich in protein and low in fat. One chicken breast can contain up to 9 grams of arginine and can be combined easily with other potent sources of vitamins and minerals like beans and vegetables in meals and stews.

Chickpeas

Another kind of chick, this time chickpeas, or as they’re also known, garbanzo beans, offer up fiber and protein (especially for those who don’t eat meat). A single cooked cup of chickpeas has at least 12 grams of fiber, over 14 grams of protein, and 1.3 grams of arginine. Enjoy it as hummus and know that it’s providing you with that little boost of arginine you’re looking for.

Peanuts

With vitamin E, vitamin B3, niacin, and folate, a cup of peanuts also gives you over 4 grams of arginine. Pine nuts, too, contain over 3 grams of arginine per cup, and a good helping of mixed nuts will almost certainly give you a fair amount of arginine, as there are levels of arginine in almonds, walnuts, cashews, Brazil nuts, hazelnuts, almonds, and pecans. Go nuts with nuts if you’re looking for foods high in arginine. Be squirrelly with them!

Soybeans

Another great protein and arginine source for non-meat eaters, soybeans and other soy products like tofu and tempeh provide potassium and magnesium. Soybeans specifically come with 4.6 grams of arginine per cup, and soybeans are also loaded with lysine for help balancing arginine.

Spirulina

Derived from a seawater blue-green algae, spirulina can be purchased in powdered form and added for its nutrients to smoothies and other foods. A cup of spirulina contains 4.6 grams of arginine, as well as iron, niacin, calcium, and potassium. You’ll probably use spirulina sparingly, but when you do know that it brings you that much more arginine along with its other nutrients.

Lentils

Another great vegetarian/vegan source of protein and fiber, arginine can be found in lentils up to 1.3 grams per cup, with lysine again to pack a double punch of amino acid intake. Lentils also pair excellently with the meats on this list for the carnivores who are interested—there’s an arginine-rich meal in the making here.

Dairy Products

Dairy products are sources of protein and thus arginine too. Just 4 ounces of cheddar cheese has a small amount of arginine, 0.25 grams, and a cup of milk has 0.2 grams, just a little bit more arginine for your effort. Some good news: if your dairy is coming in the form of ice cream, chocolate syrup has 0.9 grams of arginine per 100 grams, so add a little of it on top, or have some chocolate milk while you’re at it, and know that you’re getting some arginine there too.

Watermelon Seeds

We’ve saved the most curious for last: though most of us spit out or avoid the seeds in our watermelons, they contain over 5 grams of arginine per cup, so feel free to swallow them knowing they’re doing you no harm and also bringing you a little bit good—you can’t lose!

Arginine Foods and You

The value of gaining more arginine from foods is that it’s as natural as the healthy production of arginine within us. Not only is arginine deficiency blessedly low due to its levels in our food, but if you’re gaining a bit more of it through dietary intake, you’re not very likely to get too much of it either. With evidence showing arginine helps blood flow and heart health along with the immune response to cancer, it’s a natural amino acid to value and desire.

However: do remember that if you’re looking for even more arginine in supplement form (as with any sort of dietary supplement), it’s important not to go overboard. Too much of any one vitamin, mineral, or amino acid might have the unwanted effect of overtaxing a specific part of the body. Whether it’s by causing an excessive clean-up in the liver or kidneys, or overwhelming the other chemicals in the body that your chosen one works in concert with, you don’t want to throw yourself off kilter.

Look into well-rounded multivitamins or comprehensive essential amino acid blends that offer a measured balance of your body’s needs. Extremely high levels of arginine are no more desirable than low levels of arginine. Instead, what’s important is to have a healthy arginine ratio in the body that will meet your needs but not overwhelm your system. Eat well, supplement well, and prosper!

How Amino Acids Support Female Muscle Growth

Is it truly more challenging for women to build muscle? To answer that question, we first separate the myths about gender differences and muscle growth from the actual science. Then, we offer tips everyone can use to get serious muscle growth results.

Female muscle growth. It’s not a phrase you hear too often. However, whether you’re a man or a woman, muscle building benefits your overall health and well-being. Strong scientific evidence shows that increasing your lean muscle mass can help you stay healthy as you age, support fat loss by keeping your metabolism running at full capacity and prevent the development of chronic diseases.

If you’re born male, you’re coached from a young age to want to grow up to be big and strong. But if you’re born female, you receive the opposite message. With the emergence of ripped and toned female fitness influencers taking social media by storm, the tides appear to be shifting. Nonetheless, society still tends to instruct girls to train themselves to be as dainty as possible—in part, so they can grow up to be women who attract big, strong men.

But the health benefits of muscle mass apply to everyone, regardless of gender. However, it can be more challenging for women to build muscle for a variety of reasons.

In this article, we’ll explore the scientific realities behind the common belief that muscle building comes more naturally to men than to women. Plus, we’ll offer tips that everyone can use to increase their physical strength and get serious muscle growth results.

Do Men Build Muscle More Easily Than Women?

If you’re at all familiar with the resources out there for people interested in muscle building, you’ve probably noticed that the vast majority of it is written by male authors for male audiences. While that has begun to shift somewhat as more women get into powerlifting, bodybuilding, and sports science, these realms are still dominated by men.

In those realms, a concept that many take for granted is that muscle gains come more easily for men than for women. This concept is propped up by claims that men and women have significant physiological differences that give men an advantage when it comes to physical strength and performance.

 

How amino acids can maximize female muscle growth.

What Science Tells Us About the Differences Between Men and Women

Let’s begin by comparing the average metabolic rates—the calories you burn just by going about your day—for men and women. According to a study published in the American Journal of Clinical Nutrition, about 90% of the variations researchers identified in the baseline number of calories participants expended over a 24-hour period came down to differences in fat mass and muscle mass. Your age has a measurable impact too. Researchers found that participants between 50 and 65 years of age had baseline metabolic rates that were 4.6% lower than participants between the ages of 20 and 30.

Fascinatingly, they reported: “No sex difference in any energy expenditure measurement could be found.” However, women do tend to have slower metabolisms than men, but it’s not because they’re women, it’s because on average, women are smaller and have less muscle mass.

So, let’s look into muscle mass differences. Findings published in the Journal of Applied Physiology reveal that women have, on average, about 67% of the muscle mass men do.

Women lag further behind when it comes to the muscle groups of the upper body than those of the lower body. A research team from the departments of Physical Education and Medicine at McMaster University in Hamilton, Canada set out to determine how gender differences influence strength and muscle fiber characteristics. They found that female participants had approximately 52% of the upper body strength and 66% of the lower body strength of men.

These differences appear to have more to do with the likelihood that men will have larger muscles than with innate sex-based differences, though. A study published in Ergonomics sought to measure the extent to which differences in strength between men and women can be explained by muscle size. Researchers found that when they adjusted their findings to take into account overall muscle mass as well as the size of specific muscle groups, 97% of sex-related differences were in strength. The researchers state that their findings suggest muscle size “almost entirely” accounts for the differences we expect to see between a man’s physical strength and a woman’s. In other words, if a man and woman have comparable muscle mass, they should be equally strong.

It appears that the vast majority of the differences we attribute to sex actually have to do with body composition. A woman and man with similar previous experience in terms of physical activity and comparative amounts of muscle and fat will perform similarly on standard measures of strength.

However, there are some differences between the ways men’s bodies and women’s bodies tend to respond to strength-training regimens and individual workout plans.

How Hormones Affect Female Muscle Growth

Hormones tend to be the first factor people point to when talking about physiological differences between women and men. It’s only logical, given that men’s increased muscle mass results from higher testosterone levels. Hormone levels fluctuate from person to person and over time, but on average, women produce far less testosterone than men do—between 15 and 20 times less, according to data sourced from the U.S. National Library of Medicine.

However, the question of testosterone levels isn’t as clear cut as we tend to think. In fact, some men have lower testosterone levels than some women do. After a team of researchers from the U.K. analyzed the hormone levels of elite athletes, they found significant overlap between testosterone levels for male competitors and female competitors. It’s worth noting that the hormone profiles of elite athletes differ from those of average individuals. It’s also highly likely that women with naturally higher levels of testosterone are more likely to excel at the elite level in certain physical disciplines. The main takeaway is that the idea that men have higher testosterone levels and therefore build new muscle more easily doesn’t entirely hold up.

Furthermore, did you know that testosterone is not the only hormone involved in building muscle mass? Estrogen, which as you may know, women typically produce at higher levels than men do, has also been shown to have significant benefits for muscle growth.

Studies done with animal subjects and well-controlled studies with human subjects support the idea that estrogen can help to prevent the breakdown of muscle tissue that often accompanies the aging process. It appears that estrogen has an overall positive impact when it comes to maintaining and increasing your lean muscle mass.

And an article published in Exercise and Sport Sciences Reviews presented experimental findings suggesting that estrogen may have an anabolic effect on muscles, meaning it supports muscle gain. It appears to do this primarily by lowering protein turnover, which slows the rate of catabolism (muscle breakdown), and enhancing the sensitivity of muscle tissue to resistance training.

Estrogen also boosts your metabolism, making it easier to cut your body fat percentage. While that doesn’t directly contribute to muscle growth, it does mean the new muscles you build will be more visible.

Women and Men Build Different Types of Muscles

We all have two general types of skeletal muscle fibers: slow-twitch, or Type 1, and fast-twitch, or Type 2. Type 1 muscles help power you through feats of endurance, like marathons. And the more Type 2 muscles you have, the better you perform on tests of explosive strength, like Olympic weight training.

There’s a clear divide between the average percentages of Type 1 and Type 2 muscle fibers that women and men typically have. According to Greg Nuckols, an experienced fitness writer who holds a BS in Exercise and Sports Science and three all-time world records for powerlifting, women typically have more Type 1 muscle fibers than men do, about 27% to 35% more. Women also tend to have greater capillary density.

Both give women an advantage in many ways. Greater capillary density means an increased ability to circulate blood through your muscle tissue to bring in fresh oxygen and clear out waste products. And having a higher percentage of Type 1 muscle fibers gives you an improved capacity for glucose and fatty acid oxidation, which translates to a decreased risk of chronic conditions linked to metabolic health, like diabetes and heart disease.

However, Type 2 muscle fibers are thicker, quicker to contract, and engage when your body nears maximum exertion. If you’re looking to increase your muscle mass and build strength so you can lift heavier and heavier weights, you need to recruit your Type 2 muscles. There’s no evidence that Type 1 muscle fibers can be transformed into Type 2 muscle fibers (or vice versa), which means there may always be a gap between the level of explosive strength an experienced female weight lifter can generate and the amount a male lifter at the same level can generate.

Maximizing Muscle Growth as a Woman

While men may have some innate advantages when it comes to building muscle mass, studies show that both men and women gain muscle at the same rate when they commit to workout routines like resistance training, weight training, and high-intensity interval training (HIIT).

Researchers from the University of Maryland Exercise Science and Wellness Research Laboratories conducted a study in which participants committed to a 6-month, whole-body strength-training program that worked for all the major muscle groups in both the upper and lower bodies.

They used MRI images to assess thigh and quadriceps muscle volume as well as mid-thigh muscle cross-sectional area before and after the strength-training program. Their findings showed that the thigh and quadriceps muscle volume increased significantly for all age and gender groups as a result of the strength-training program. The researchers found no significant differences related to either participant age or gender.

In some cases, women can make more significant strength and muscle gains than men. A study published in the International Journal of Sports Medicine examined how men and women responded to weight-training and resistance-training approaches. The researchers found that after following the same short-term training program, female participants made more significant strength increases than male participants did.

For women interested in optimizing their body composition by decreasing their body fat percentages and increasing their muscle mass, there are certain strategies you can put in place to maximize your muscle-building potential.

Train Strategically

When it comes to building muscle, the first step is to institute a strength-training regimen. For those seeking to rapidly increase muscle growth who are comfortable and able to perform high-intensity workouts, the most effective strength-training approach will involve lifting increasingly heavy weights. That might mean using barbell, kettlebells, dumbbells, or other types of weights.

Incorporating weightlifting into your training sessions encourages muscle growth because of the strain it places on your muscles. This wear and tear breaks down the muscle tissues. Then, during the recovery process that takes place while you sleep and on rest days, your muscles rebuild themselves. Each time this process takes place, your muscles grow bigger and stronger.

Adding high-intensity interval training to your exercise routine can also increase your muscle gains. This method of training involves short burst of intense exertion—a great tactic for recruiting your Type 2 muscles.

Increase Your Protein Intake

As you know, your muscles are made up of proteins. In order for your muscles to successfully rebuild themselves after workouts, you need to provide them with an adequate supply of dietary protein.

There’s no one-size-fits-all answer to the question of how much protein your muscles need to properly build and repair themselves. Factors like age, weight, activity level, and training goals will all influence the amount of protein an individual needs to consume.

Federal guidelines set the minimum recommended amount of protein consumption for adults at 17% to 21% of your daily calories, and that’s without taking weight training into consideration.

As Jim White, RD, ACSM, explained, resistance training increases the process of protein turnover. By eating proteins laden with all the essential amino acids, you’re providing your body with the raw materials it needs to build muscle.

According to the American College of Sports Medicine, if you’re looking to build muscle mass, you should aim to consume between 0.5 and 0.8 grams of protein per pound of body weight. That means a 150-pound woman, for example, should set a protein intake target of 75-120 grams of protein each day. It’s also important to consider the percentage of your overall calorie intake that comes from protein.

White, as well as other experts, recommends prioritizing the post-workout window for protein consumption as this has the biggest impact on muscle growth. Findings published in the Journal of the International Society of Sports Nutrition indicate that protein consumption before workouts can also be a key factor. Eating protein both before and after workouts can boost your performance, speed your recovery time, and increase your lean muscle mass.

Amino Acids Can Boost Female Muscle Growth

While it’s entirely possible to meet your body’s protein needs through diet alone, it can be helpful to add in high-quality supplements, including protein powders. Especially if you have a busy schedule that makes it challenging to consume enough protein during meal or snack times, it can be highly beneficial to provide your body with amino acids from other sources.

Researchers have found that certain supplements can be particularly helpful when it comes to building and maintaining muscle mass. If you’re wondering about the best amino acids for muscle growth, here are three to consider.

How amino acids can maximize female muscle growth.

1. Creatine

Creatine, an amino acid compound found naturally in the human body as well as in foods like red meat, has been the subject of hundreds of studies. If you’re lifting weights and looking to amplify your results, you may want to consider supplementing with creatine.

Media reports may have lead you to believe that creatine supplementation can adversely impact the health of your kidneys, but scientists have repeatedly and conclusively found that not to be the case.

After going over all available data on the short-, medium-, and long-term effects of creatine supplementation, researchers from the Higher Institute of Physical Education and Readaptation in Brussels, Belgium found no evidence that creatine causes liver dysfunction in healthy individuals (individuals with pre-existing kidney disease should avoid creatine). The researchers concluded that individuals who take creatine “do not report any adverse effects, but body mass increases.” They also noted that creatine may benefit the health of your heart and help reduce your risk of neurological diseases.

Studies show that supplementing with creatine can increase your lean body mass, enhance your anaerobic working capacity, and minimize the muscle damage caused by extreme exertion.

2. Beta-Alanine

This naturally occurring amino acid has also been the subject of extensive research.

One reason for this is that beta-alanine is the rate-limiting precursor of carnosine, an amino acid found in high concentrations in human skeletal muscle. One study on the effects of beta-alanine supplementation found that it can increase concentrations of carnosine in your muscles, which in turn helps to prevent muscular fatigue.

A separate study published in the Journal of the International Society of Sports Nutrition found pairing beta-alanine supplementation with high-intensity interval training (HIIT) can substantially increase both endurance and aerobic metabolism. It also showed a clear and impressive impact on subjects’ lean muscle mass.

Plus, a third study that examined how beta-alanine impacted anaerobic power output by using tests of physical strength such as timed sprints and a 90° bent-arm hang found that supplementing with beta-alanine improved participants’ results across all categories. Participants who supplemented with beta-alanine were able to achieve simultaneous weight loss and lean body mass increases.

3. Citrulline

Supplementing with citrulline can significantly increase your blood levels of not only this important amino acid, but two other crucial amino acids as well: ornithine and arginine. This can have a wide range of health benefits.

According to findings published in the The Journal of Strength & Conditioning Research, even a single dose of citrulline can improve your physical performance as measured by a flat barbell bench press. It can also reduce post-exercise muscle soreness. Participants were able to complete approximately 53% more repetitions and reported 40% less muscle soreness at both 24 and 48 hours afterward.

A separate study published in the British Journal of Sports Medicine showed that citrulline reduced muscular fatigue and improved muscle metabolism as measured by oxidative ATP production and the rate of phosphocreatine recovery after exercise.

All in all, it appears that this amino acid can improve endurance and speed up recovery time.

Greater Than the Sum of the Parts

Your muscles aren’t composed of single amino acids, but rather 20 separate amino acids. Building muscle mass requires a steady supply of all those amino acids. Nine of those are essential amino acids, meaning you must get them from the foods you eat or supplements you take.

While certain amino acids have been shown to have more dramatic results when it comes to muscle growth, your rate of muscle protein synthesis will be limited by whichever essential amino acid is in the shortest supply. That’s why some of the foremost experts on amino acids believe that taking an essential amino acid (EAA) blend is ultimately the most effective way to build your muscle mass. Using a supplement formulated to include all the required amino acid building blocks stimulates the production of new muscle tissue more effectively than any single amino acid could.

What Are Hydrophilic Amino Acids?

You may have run across the term hydrophilic amino acids and wondered what it meant and what do they do? Hope you feel like brushing up on some basic organic chemistry, because this article’s aim is to shed some light on the subject.

You may have run across this term and wondered what it meant—what are hydrophilic amino acids and what do they do? Hope you feel like brushing up on some basic organic chemistry, because this article’s aim is to shed some light on the subject, and give you a quick chemistry refresher course on these important structures and molecules in our bodies.

Definitions

We’ll start with the basics: polar molecules, hydrophilic vs. hydrophobic molecules, and the amino acids.

Polar Molecules

Polar molecules are what form when two atoms from different elements come together to make an uneven compound. One atom will be stronger and will pull negative electrons away from the other atom. That makes the molecule polar: one end is positive, with fewer electrons, and the other end is negative, hogging as many electrons as possible.

Water is a polar molecule because H2O means there’s two hydrogen atoms that can then form hydrogen bonds attached to the one stronger oxygen atom: oxygen has six electrons of its own, but it can hold onto eight, and so when two unsuspecting hydrogen atoms come along, each of them having just one electron to call their own, oxygen gathers them close and insists that they share. Now oxygen has all eight of its electron spots filled. With the majority of the electrons always resting on oxygen’s side of the bonded H20 molecule, water is a polar molecule, and oxygen holds the negative side of the bond, while the hydrogens hold a positive charge. Now, speaking of water molecules…

Hydrophilic

Hydrophilic means “water loving,” and hydrophilic molecules are receptive to water and are likewise in the polar group of molecules. Hydrophilic molecules can bind with water, and thus they make up substances that can dissolve in water. Sugar and salt are examples of hydrophilic substances, but even the Titanic, 2 miles down at the bottom of the ocean, is slowly dissolving in water and corroding away. Water is not easy to resist.

Hydrophobic

Water is not impossible to resist, however: hydrophobic molecules resist water, repel it even, or as the name suggests, they are phobic or “fearful” of water. Examples of hydrophobic molecules are oils, fats, and lipids that will not dissolve in water.

Elementary science: put some colorful oil and water into one clear bottle, shake up it like crazy, and then watch as the oil and water slowly return to their own sides of the bottle. Oil will float to the top, and water will pool on the bottom. As hydrophilic molecules dissolve in water and are polar, hydrophobic ones will only dissolve in oil and are nonpolar.

Amino Acids

Amino acids are the building blocks of protein structures in the body and are each made up of several molecular groups. Each amino acid has a core alpha carbon atom (Cα), and attached to that is a single hydrogen atom, a carboxyl group (-COOH), and an amino group (-NH2).

If you think of an amino acid structure as a four-member band like the Beatles, the alpha carbon is their manager Brian Epstein. The alpha carbon manager then signs on (or rather peptide bonds with) Ringo, Paul, and George in a ring structure around him. Then he signs the most defining member of the band, the R group side chain, or as per our metaphor, John Lennon. The R group you can think of as the Radical group, the one that provides each amino acid with its defining functions.

Of the 20 common amino acids, all are defined by their R group’s chain atoms. The nine hydrophobic amino acids are alanine (Ala), glycine (Gly), valine (Val), leucine (Leu), isoleucine (Ile), phenylalanine (Phe), proline (Pro), methionine (Met), and tryptophan (Trp). The nine hydrophilic amino acids are listed below, with the remaining two amino acids tyrosine (Tyr) and cysteine (Cys) defying categorization at this time.

Hydrophilic Amino Acids

To recap: hydrophilic amino acids are polar amino acids, they seek aqueous solutions, meaning they love water and can’t wait to dive in the pool. Here are their amino acid names, with their uses and functions explained and defined.

Hydrophilic amino acids: what do they do?

Arginine

  • Three-letter code: Arg
  • One-letter code: R

Arginine is a conditionally essential amino acid. Sometimes the body is able to synthesize arginine in-house, and sometimes (in young and premature infants for example, or in extreme cases of trauma like burn victims), the body needs arginine to come from an outside source. Arginine can be found in foods such as chickpeas, nuts, soybeans, seeds, seafood, poultry, beef, and dairy products.

Arginine plays a role in strengthening the body’s immune system, detoxifying the liver, promoting fertility in males, and keeping supple the skin and joints. Arginine is being researched as a treatment for cancer, AIDS, and impotence.

Asparagine

  • Three-letter code: Asn
  • One-letter code: N

Asparagine is a nonessential amino acid, but though we don’t require it in our diet, it can still be found in seafood, eggs, beef, dairy, soy, nuts, legumes, and asparagus where it was first discovered (hence the name). Asparagine has a necessary role to play in protein synthesis and is used for ideal functioning in the human nervous system (it helps us maintain equilibrium).

Aspartate

  • Three-letter code: Asp
  • One-letter code: D

Nonessential, aspartate or aspartic acid is derived within the body from oxaloacetate, ornithine, or citruline. Aspartate is incredibly important in building protein molecules, and specifically vital to several other essential amino acids like threonine, lysine, isoleucine, and methionine. Aspartate is like the office administrative assistant that gets a raise every year, because the whole place would be a mess without its ongoing support.

Glutamine

  • Three-letter code: Gln
  • One-letter code: Q

Glutamine is a nitrogen transporter, a muscle builder, a sanitation worker (removing ammonia from the liver), and a light rail conductor, able to pass through the blood-brain barrier to assist with our central nervous system. Glutamine may have uses in mental health functioning as a treatment for depression, epilepsy, senility, and schizophrenia, as well as potential to benefit those with Crohn’s disease and other intestinal disorders.

Glutamine is popular as a supplement among bodybuilders, and for good reason: up to 60% of muscle tissue in the body is made of glutamine. Because of its ability to build muscle mass, glutamine is also used for those with potentially muscle-wasting medical conditions like cancer and AIDS.

Glutamine can also be gained from many foods, but its sources (leafy green vegetables such as parsley and spinach) should be eaten raw, as cooking them negates the glutamine content.

Glutamate

  • Three-letter code: Glu
  • One-letter code: E

A neurotransmitter, glutamate is the anion of glutamic acid and is a nonessential amino acid. Important in cellular metabolism, glutamate plays a role in memory and learning, and primarily functions and resides in the brain.

Histidine

  • Three-letter code: His
  • One-letter code: H

An essential amino acid, histidine develops the myelin sheaths in the brain, which coat our nerve cells and allow for the transmission of electrical messages. Balance is important when it comes to histidine, as too much of it has been linked to disorders like schizophrenia and anxiety, while too little has been linked with deafness from nerve damage, as well as rheumatoid arthritis.

Histidine is important in sexual health, as it’s responsible for the chemical (histamine) that stimulates sexual arousal. With roles in the immune system and a contributing factor in digestive health, histidine is invaluable. A detoxifier, it can be gained from eating high-protein foods like wheat, rice, rye, dairy products, and meat.

Lysine

  • Three-letter code: Lys
  • One-letter code: K

An essential amino acid, lysine can be obtained from eggs, milk, cheese, potatoes, fish, red meat, soy products, and lima beans. Antiviral, it helps prevent cold sore and herpes outbreaks and is important for bone growth and health. Supplemented for those with shingles or other viral outbreaks, lysine also speeds injury recovery and muscle strength.

Serine

  • Three-letter code: Ser
  • One-letter code: S

Serine (like threonine below) possesses a hydroxyl group in its chemical structure, meaning there’s an extra oxygen atom bonded to a hydrogen atom. Lack of serine may be associated with fibromyalgia, chronic fatigue syndrome, insomnia, depression, and anxiety, and is essential in healthy brain functioning.

A nonessential amino acid, serine is derived from glycine, resides in the myelin sheaths covering our brain’s nerves, and produces the phospholipids that contribute to making every cell in the human body. From the immune system, to the central nervous system, to the muscles of the heart, serine is invaluable.

Threonine

  • Three-letter code: Thr
  • One-letter code: T

Threonine is an essential amino acid that can be obtained from food sources like meat, poultry, fish, sesame seeds, lentils, and cottage cheese. Threonine is needed to make both glycine and thus its derivative, the above serine. It also supports the immune system by aiding the supply of antibodies, is involved with liver function, and contributes to cardiovascular health. Useful for treating ALS (or as it’s commonly known, Lou Gehrig’s disease), threonine may lessen the symptoms of the condition.

Water, Water, Everywhere

Hopefully now you have a solid understanding of the nature and designation of the different amino acids in the hydrophilic category. Go forth with this knowledge, and if you love water too, go swimming the next time you get a chance.

What Are Nonpolar Amino Acids?

What are nonpolar amino acids? This article will help explain how these amino acids are designated and what purpose they serve in the body.

Of the 20 common amino acids in the human body that build protein structures, 9 of them are essential (meaning we must eat or otherwise consume them to get them), and half of them are nonpolar. What are nonpolar amino acids? Which are they, and what does “nonpolar” mean? The review of the topic in this article will help explain.

The Definition of a Nonpolar Molecule

The nonpolar molecules we’ll be talking about are hydrophobic amino acids, meaning “water fearing” because they don’t mix with water molecules. You know how oil and water don’t mix? That’s because oil is hydrophobic.

The opposite of a nonpolar molecule is, as you might guess, polar. Polar molecules are hydrophilic, meaning “water loving.” If you’d like to visualize: polar molecules are like puppy dogs who love water so much that they’ll go barreling straight into muddy or smelly water after a tennis ball, with no hesitation at all. That would make nonpolar molecules like cats, better known for avoiding water, no thank you, and cleaning themselves without it.

Molecules are classified this way based on the charges on the atoms bonded together to form the molecule. If you remember your first taste of high school chemistry, you may remember that atoms have a nucleus of neutral neutrons and positive protons in the middle, and negative electrons swirling all around. Protons have a positive charge that draws electrons to it, like how opposites attract.

When two atoms bond together, they share electrons. Two atoms of the same element have equal positivity, so don’t have the power to steal electrons from the other. These molecules are nonpolar because they have no resulting charge. When atoms of two different elements connect together, invariably one of them will have the higher charge and attract the most electrons to its end of the joint molecule. That means the molecule is polar, or charged, and that charge will then be identified as either a positive or negative charge.

Examples of Nonpolar Molecules

Methane gas is an example of a nonpolar molecule that is created during the breakdown of food and released as a gas (or more colloquially, a fart). Methane is made up of one carbon atom that is bound to four hydrogen atoms: this hydrogen bonding allows the atoms to all share electrons equally, so this smelly molecule has no charge and is nonpolar.

Inside our body, we have both polar and nonpolar molecules, which includes those 20 amino acids mentioned above.

Nonpolar Amino Acids

The chemical properties of amino acids are largely determined by one group of molecules, what’s known as the R group: a side chain that differs on each amino acid. To visualize the amino acid groups, picture a pizza with four toppings, and a little support table in the middle that’s there to keep the cheese from sticking to the lid. That table is the alpha carbon to which all the groups or toppings are attached.

Every amino acid has three groups/toppings in common: the amino group (-NH2), the carboxyl group (COOH), and a hydrogen atom, which in pizza terms would be three standard toppings, say pepperoni, sausage, and cheese (cheese is hydrogen, which is just one atom and not a group of them, and so it gets the plainest topping). That fourth quarter of the pizza? That is the R group, the functional group that identifies and characterizes different amino acids—when you think of the R group, think R for Radical, because that is a completely different and unique topping, and every R group amino acid side chain has a distinct flavor of its own. To get up to 20 it would have to be pineapple, spinach, olives, Canadian bacon, jalapeño, garlic, anchovies, bell pepper, salami, feta cheese, beef, oregano, bacon, barbecue sauce, chicken, pesto, chorizo, broccoli, eggplant, and mushroom. Some are weirder than others.

The nonpolar amino acids have R groups mostly made up of hydrocarbons, though the amino acids methionine and cysteine also each feature a sulphur atom. The nonpolar amino acids are as follows, with more information on each one.

Glycine

  • Three letter code: gly
  • One letter code: G

The body needs glycine to make compounds like as glutathione, creatine, and collagen, which is the most abundant protein in your body. Collagen is a vital part of your muscles, blood, skin, cartilage, ligaments, and bones. Glycine may also protect your liver from alcohol damage, contribute to heart health, and improve your sleep quality. Glycine might also protect those with type 2 diabetes from muscle-wasting. You can gain more glycine by eating certain meat products or by taking a collagen supplement.

Alanine

  • Three letter code: ala
  • One letter code: A

Alanine is an amino acid that helps convert glucose into energy and helps eliminate excess toxins from your liver. Alanine keeps muscle protein from being cannibalized by the body during intense aerobic exercise or activity, and it’s needed to balance nitrogen and glucose levels in the body, which it does via the alanine cycle.

Alanine is a nonessential amino acid, which means that usually your body can make the substance on its own and doesn’t need you to ingest it from outside. However, people with eating disorders, extremely low-protein diets, diabetes, liver disease, or certain genetic conditions that cause UCDs (urea cycle disorders), may need to take a supplement or adjust their diet to gain this amino acid.

Good sources of alanine are meat, fish, poultry, eggs, and dairy products, as well as some protein-rich plant foods, like avocado. There are supplements containing alanine on the market, however, taking any one amino acid alone could upset the balance of nitrogen in the body, putting stress on the liver and kidneys as they try to eliminate waste. It is advisable that those with liver or kidney disease should consult a trusted medical professional before taking any amino acid supplement.

Proline

  • Three letter code: pro
  • One letter code: P

Proline is needed for the manufacture of cartilage and collagen, which helps heal cartilage and cushion our joints and vertebrae. It keeps joints flexible, and skin supple when it is affected by sun damage or signs of normal aging. Proline breaks down proteins for cell creation, and is essential at sites of injury where the tissue must be rebuilt to heal. Proline supplementation is sometimes valuable to people with chronic back pain or osteoarthritis.

Proline is also needed for the maintenance of muscle tissue, and is sometimes found low in long-distance runners and other serious athletes. Proline is usually nonessential, as the body naturally derives proline from its supplies of glutamic acid. However, if necessary, proline can be found in natural sources like dairy, meat, and eggs, or can be gained from amino acid supplementation.

Valine

  • Three letter code: val
  • One letter code: V

Valine is a branched-chain amino acid (BCAA) that works with the other two BCAAs (isoleucine and leucine) to regulate blood sugar, repair tissues, and provide the body with energy. Valine assists in stimulating the central nervous system and is necessary for mental functioning. Valine helps provide muscles with extra glucose energy during intense physical activity, which prevents muscle breakdown, and helps remove toxic excess nitrogen from the liver. Valine may help the liver and gallbladder recover from damage due to alcoholism or drug abuse, as well as help possibly reverse alcohol-related brain damage, or hepatic encephalopathy.

Valine is an essential amino acid, and must be obtained through a diet including meats, mushrooms, dairy products, peanuts, and/or soy protein. Most people have no problem getting enough valine, however maple syrup urine disease or MSUD is caused by an inability to metabolize leucine, isoleucine, and valine. Supplementation is sometimes warranted in those with low-protein diets or who are trying to build muscle mass, but be advised that too much valine intake will make one’s skin feel like it is crawling, and may cause hallucinations. Supplements should always be taken responsibly.

Leucine

  • Three letter code: leu
  • One letter code: L

Leucine helps with blood sugar regulation, muscle repair, and energy production. It also helps burn fat located deep inside the body that is hard to reach through diet and exercise alone.

Leucine is a branched-chain amino acid (BCAA) along with valine and isoleucine, all of which help to promote post-exercise muscle recovery, leucine being particularly effective, as it converts to glucose the fastest of the three. That is also why leucine is closely linked with the regulation of blood sugar, and why a leucine deficiency causes symptoms like hypoglycemia: headaches, fatigue, dizziness, confusion, depression, and irritability.

Leucine promotes the recovery of skin, bones, and muscle tissue after injury or surgery. Natural sources of this essential amino acid are meat, nuts, soy flour, brown rice, beans, and whole wheat.

Isoleucine

  • Three letter code: ile
  • One letter code: I

An isolated form of leucine, isoleucine is prized by bodybuilders for its ability to increase endurance, help repair muscle tissue, and encourage clotting at sites of injury. Isoleucine is broken down for energy inside muscle tissue, and helps stabilize energy levels by aiding in blood sugar regulation. An isoleucine deficiency also produces symptoms that mimic hypoglycemia.

Isoleucine is an essential amino acid, and food sources include high-protein options like nuts, peas, lentils, seeds, meat, eggs, fish, and soy protein.

Methionine

  • Three letter code: met
  • One letter code: M

An essential amino acid that helps the body process and eliminate fat, methionine contains sulfur, a substance required for the production of the body’s natural antioxidant, glutathione. The body also needs methionine to produce two other sulfur-containing amino acids, cysteine and taurine, which help the body eliminate toxins, build tissues, and promote cardiovascular health.

Methionine helps the liver process fats (lipids), preventing accumulation of too much fat in the liver, which is essential for the elimination of toxins to stay functional. Methionine is needed to make creatine, a nutrient found mainly in muscle tissue and often taken as a supplement to boost athletic performance. Methionine is also needed for collagen formation, which is then used to make skin, nails, and connective tissue. One study suggested that taking 6 grams of methionine a day can improve memory recall in AIDS patients who otherwise show a marked methionine deficiency. Methionine may also help treat symptoms of Parkinson’s disease.

Methionine is an essential amino acid, and can be gained from eating garlic, beans, seeds, eggs, fish, lentils (in lower levels), meat, onions, soybeans, and yogurt.

Tryptophan

  • Three letter code: trp
  • One letter code: W

Tryptophan is an essential amino acid that helps balance nitrogen in adults and growth in infants. It also creates niacin, which is needed to create the “happy” neurotransmitter serotonin. In this way, tryptophan helps influence relief from depression and anxiety, managing pain tolerance and increased emotional well-being. Tryptophan is also associated with promoting deeper sleep.

You can get tryptophan through certain foods or a supplement in powder form. Natural food sources include cheese, milk, fish, turkey (famously), chicken, eggs, pumpkin and sesame seeds, chocolate, as well as tofu and soy.

Phenylalanine

  • Three letter code: phe
  • One letter code: F

Phenylalanine is an essential amino acid that is needed for the functioning of the central nervous system. It has been successfully used to help control feelings of depression and chronic pain, and other diseases linked to a malfunctioning central nervous system. Especially effective for treating brain disorders, phenylalanine is able to penetrate the blood-brain barrier, and only chemicals that are able to cross that barrier can directly influence brain function.

Phenylalanine is used to make epinephrine, dopamine, and norepinephrine, neurotransmitters that control how you perceive and interact with the world around you. Phenylalanine supplementation can help you feel happier and more alert, and it also has been used to treat chronic pain and improve cognitive function. An essential amino acid, phenylalanine is normally obtained from high-protein foods like meat, fish, chicken, eggs, milk, dairy products, beans, and nuts.

Cysteine

  • Three letter code: cys
  • One letter code: C

Cysteine is an amino acid containing a sulfur atom, and is used to form healthy bones, skin, hair, and connective tissue. It is also needed to make glutathione, one of the body’s natural antioxidants that fight free-radical damage. Cysteine and glutathione work together to remove toxins from the liver, and cysteine is often used in emergency rooms to treat acetaminophen overdoses before they can cause liver damage. It also protects the brain and liver against toxins from alcohol and cigarettes, and may be useful in preventing hangovers.

Cysteine is a nonessential amino acid, which means the body manufactures it in-house, but foods such as meat, eggs, dairy products, and whole grains are also good sources of cysteine.

Nonpolar Knowledge

There you have the rundown of the amino acid nonpolar side chains, the nonpolar aminos that variously help form protein molecules in our bodies, and do so much to keep us alive and functioning at top form.

Best Amino Acids for the Ketogenic Diet: Which Ketogenic Amino Acids Should You Be Eating?

The value of a ketogenic diet? To burn fat rather than just lose weight on the scale. The core question: in what foods can the six essential ketogenic amino acids be found?

The value of a ketogenic diet? To burn fat rather than just lose weight on the scale. Beginners at dieting often attempt to lose weight with short-term crash diets, which put the body in starvation mode and cause it to stockpile more fat as soon as possible (an evolutionary protection against times of famine). Conversely, the ketogenic diet puts the body into more of a sustainability mode, a stable way to reduce and optimize calorie intake, while focusing on foods that provide the essential amino acids for the ketogenic conversion of fat into energy.

So which ketogenic amino acids should you be eating, and where can you find them?

Amino Acids: the Fat Burning, the Sugar Forming, and the Switch Hitters

The building blocks of protein, amino acids can be categorized as exclusively ketogenic, exclusively glucogenic, or like Dr. Jekyll and Mr. Hyde: radically both. This is based on the end products produced during amino acid metabolism.

Essential amino acids for the ketogenic diet.

As you can see, the predominant category is the glucogenic group, with 13 amino acids. The carbon skeletons that result from the breakdown of glucogenic amino acids can be used via gluconeogenesis to synthesize glucose, simple sugar and an important energy source found in many carbohydrates. These are not the amino acids that will derive energy from your body’s pre-existing fat stores.

The second largest category contains five amino acids, the switch hitters that when catabolized can yield both glucogenic and ketogenic products.

Exclusively ketogenic amino acids are just that: exclusive. Lysine and leucine are the only two amino acids that produce Acetyl CoA or Acetoacetyl CoA without any glucogenic byproducts.

Acetyl CoA (the precursor of ketone bodies) and Acetoacetyl CoA are the first steps of the Krebs Cycle of energy production, which combines glycolysis and pyruvate oxidation with the citric acid cycle (which itself includes α-ketoglutarate, succinyl CoA, fumarate, and oxaloacetate—all byproducts of glucogenic amino acids). To access citrate synthase, the catalyst of this cycle, without glucose or carbohydrates is the value of ketogenic amino acids: it’s like buying the product you need without bringing home any unnecessary or harmful packaging around it.

Acid Eater: the Amino Acids Essential to a Ketogenic Diet

Classes of amino acids can be further categorized as essential vs. nonessential, essential being the ones you must eat to obtain, and nonessential being those that naturally occur in the body, and are not reliant on the food you eat.

Nonessential amino acids:

  • Asparagine
  • Alanine
  • Glutamic acid
  • Aspartic acid

Essential amino acids:

  • Histidine
  • Valine
  • Methionine
  • Isoleucine
  • Phenylalanine
  • Threonine
  • Tryptophan
  • Leucine
  • Lysine

You may have noticed those last two are the exclusively ketogenic amino acids, meaning they only come from sources outside the body. Likewise, four out of five of the switch hitter or versatile amino acids are on this essential list as well, excluding only tyrosine, a conditional essential, as it’s derived from phenylalanine (which is itself essential). Regardless of that particular debate, the core question remains: in what foods can the six essential ketogenic amino acids be found?

The Key Ingredients to Ketogenesis

Intro 101 of the keto diet is to go deeper when dieting, to the cellular level of biological sciences. This is more advanced than the grocery aisle surface choices people often make between low-carb and no-sugar-added options. It’s important to remember that the colorful labeling on the front of food packages can often be subjective. It’s better to know how to read the nutrition label with a keen (keto) eye.

Better yet, know what basic foods have the ketogenic keys to turn fatty acids into ketone bodies. These ketone bodies will then provide energy from your fat stores, without adding carbohydrates, and without impacting insulin or blood sugar levels. Here are where the six essential ketogenic amino acids reside.

1. Isoleucine

Along with leucine and valine (glucogenic), isoleucine is an isomer (isolated form) of leucine that is one of the three branched-chain amino acids (BCAAs), all of which help to promote post-exercise muscle recovery. Involved in hemoglobin production, isoleucine can be found in:

  • Protein sources like meat, fish, and eggs
  • Dairy, particularly cottage cheese
  • Seeds, grains, nuts, and beans including almonds, brown rice, cashews, lentils, and chia seeds

2. Phenylalanine

The source of tyrosine and one of the aromatic amino acids, phenylalanine is used in the biosynthesis of norepinephrine, dopamine, and thyroid hormones (huge players when it comes to mental health). Possibly effective in treating mood disorders, phenylalanine is contained in:

  • Olives, figs, raisins, avocados, pumpkins, and most berries
  • Meat, chicken, fish, and eggs
  • Rice, beans, quinoa, and seeds
  • Spirulina, seaweed, and leafy greens

3. Threonine

An essential nutrient in the diet of vertebrates, threonine supports the central nervous system, along with the heart, liver, and immune system. A key component in the production of collagen, elastin, and muscle tissue, threonine can be gained from:

  • Beans, nuts, lentils, and quinoa
  • Lean beef, lamb, pork, and chicken/turkey
  • Seafood including shellfish, particularly salmon, whelks, cuttlefish, octopus
  • Seeds, including chia and hemp seeds
  • Raisins, figs, avocados, and pumpkin
  • Spirulina, watercress

4. Tryptophan

Needed for nitrogen balance, tryptophan is also used to produce melatonin (for regulating sleep and wakefulness), niacin, and serotonin, the neurotransmitter known as the “happy” chemical. Tryptophan can be found in:

  • Turkey (rather famously), as well as red meat, rabbit and goat meat, eggs, and fish
  • Milk and cheese, particularly reduced fat mozzarella
  • Pumpkin and squash seeds, along with chia, sesame, and sunflower seeds
  • Almonds, peanuts, bananas, and chocolate (ideal ingredients for a sundae)
  • Spirulina

5. Leucine

Another of the BCAAs, and one of the two exclusively ketogenic amino acids, leucine builds muscle by stimulating protein synthesis. It can be sourced from:

  • Nuts, peas, beans, seeds, and pumpkins
  • Chicken, beef, and pork
  • Seafood including tuna
  • Soybeans, whey protein, and plant proteins
  • Cheese, particularly Parmesan

6. Lysine

Necessary in the formation of collagen, connective tissue, and muscle growth and repair in the body, lysine can be found in:

  • Protein sources like meat, poultry, seafood, and eggs
  • Beans, peas, almonds, cashews, and chia seeds
  • Spirulina, parsley
  • Cheese and yogurt
  • Whey protein

The Ketogenic Conclusion

You may have noticed some foods dominating the field; when it comes to essential amino acids for a ketogenic diet, where you find a good source of protein, you often find the ketogenic advantage. Donald K. Layman, Ph.D. along with Nancy R. Rodriguez, Ph.D. penned a paper for Nutrition Today titled “Egg Protein as a Source of Power, Strength, and Energy,” but in it pointed out that egg is not the only food that packs that much value. With so many high-yield proteins, any dietary practice—be it vegetarian, vegan, kosher, or allergy-restrictive—can still gain you the essential amino acids for perfecting your ketogenic journey if you’re diligent about ensuring your protein macros.

Your body is not so much a temple as a laboratory, a series of chemical reactions. Providing your body with the right ketogenic amino acids (instead of an overabundance of glucose precursors) sets you up for the ideal fat-burning catabolic pathways. This leads to healthy protein turnover for muscle growth, weight loss, and the energy to propel you forward.

Taking an essential amino acid supplement (which includes the ketogenic amino acids lysine and leucine) can help protect against any protein insufficiencies you may encounter while following dietary restrictions, such as the high-fat, moderate-protein requirements of the keto diet.