What Are Amino Acids? Top 8 Benefits And Food Sources

There are various amino acids, classified into different groups. Knowing them will help you better understand their benefits.

Simply stated, these are organic compounds that combine to form proteins. When the protein you take is broken down by the body, amino acids are left behind.

The body then uses these amino acids to make proteins and help the body repair tissues, grow, and perform various other bodily functions. Your body also uses the amino acids to produce energy.

What Are The Different Amino Acids?

Amino acids can be categorized into three groups:

1. Essential Amino Acids

These cannot be synthesized by the body and must come from food. They have a longer half-life than the non-essential ones.

Also, even if one essential amino acid (or a non-essential amino acid) is absent, the remaining of them cannot be used.

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

2. Nonessential Amino Acids

These can be synthesized by the body, and we don’t need them through food.

• Alanine
• Asparagine
• Aspartic Acid
• Glutamic Acid

3. Conditional Amino Acids

These are not essential, except during illness and extreme stress.

• Arginine
• Cysteine
• Glutamine
• Tyrosine
• Glycine
• Ornithine
• Proline
• Serine

There are various food sources that offer amino acids. But we will get to that later. First, let’s take a look at the benefits amino acids have to offer.

What Are The Benefits Of Amino Acids?

1. Amino Acids Fight Inflammation

Studies have shown that orally administered amino acids display anti-inflammatory activity. And there is another study that talks about how branched-chain amino acids (BCAA), which include valine, leucine, and isoleucine, can help fight inflammation as well.

2. Boost Muscle Growth

Arginine is one amino acid, which, as per studies, has been found to boost lean body mass and strength.

BCAAs are the primary building blocks of muscles – they help in the growth and repair of muscle tissue. Arginine improves blood flow to the muscles. Glutamine increases water retention in the muscles and signals cell growth.

3. Reduce Fatigue

One Swedish study shows that ingestion of BCAAs can reduce exercise exertion and mental fatigue and even improve cognitive performance post-exercise.

Amino acids also aid better sleep, and this can help reduce fatigue the following morning.

Another study shows how the amino acid tryptophan can help relieve fatigue caused by different levels of stress.

So, if you want to reduce fatigue and improve your endurance levels, amino acids can be a safe bet.

4. Promote Weight Loss

Research shows that amino acids might boost fat loss. They can improve muscle synthesis and lead to healthy fat loss as a consequence.

BCAAs have also shown to suppress appetite, and this can contribute to weight loss as well. This can also mean a reduced risk of obesity.

5. Boost Immunity Levels

Dietary supplementation of amino acids has shown to enhance immunity status and prevent infectious diseases.

Among these amino acids, glutamine seems to have the upper hand. It is recognized as a potent immuno-nutrient as it can enhance immune function to a great extent. There are several studies that support the importance of this amino acid in clinical nutrition.

According to another report by the Cambridge University press, metabolism of amino acids holds great promise in boosting immune function. More importantly, these amino acids can also elevate your energy levels and accelerate wound healing.

6. Amino Acids Improve Cognitive Health

The amino acid tyrosine was found to have beneficial effects on cognitive performance – more so during exposure to high levels of stress. And tryptophan was found to improve brain function.

Research also tells us that supplements containing amino acids can reduce symptoms of depression and anxiety as they are converted to neurotransmitters that boost mood.

7. Can Delay Aging

Amino acid supplementation can play a role in the prevention (and treatment) of sarcopenia, which is the loss of muscle tissue due to aging.

Arginine and carnitine help repair damaged DNA and promote skin firmness.

8. Promote Hair Growth

Your hair is made of amino acids, which is why it makes sense to believe that amino acids can promote hair growth. Though they are not a miracle potion, they sure do encourage stronger and thicker hair growth.

The amino acids particularly beneficial for hair growth include arginine, lysine, cysteine, and methionine. These amino acids work by producing keratin, the most important protein for hair. They also create red blood cells, which deliver more oxygen to the hair follicles and promote hair growth.

These are the various ways amino acids can keep you healthier. How do you make sure you get enough of them?

What Are The Food Sources Of Amino Acids?

Following are the major food groups that contain the most amino acids:

• Animal Proteins

These are also called the complete proteins. They include beef, pork, chicken, turkey, and eggs. Even dairy products like milk, cheese, and yogurt contain amino acids. But ensure you choose lean meats (low-fat or fat-free).

These include fish like salmon, halibut, and tuna. They also contain omega-3 fatty acids that have great benefits.

• Nuts, Legumes, And Seeds

These are incomplete proteins as not one specific food contains all the essential amino acids (unlike animal proteins). But consuming a combination of nuts, legumes, and seeds can help. Some of these foods include soybeans, lentils, chickpeas, pinto beans, black beans, almonds, and walnuts.

• Whole Grains

Quinoa is one food in this group that contains all the essential amino acids and is hence a complete protein. Other foods include whole wheat bread, whole grain pasta, and long grain rice.

Include these foods in your regular diet, and you are good to go. You can also include whey protein (in case you do physical exercise) after consulting your doctor, nutritionist or trainer.

So, does this mean anyone can take amino acids? No!

What Are The Side Effects Of Amino Acids?

Excess intake of amino acids (both BCAAs and otherwise) can lead to certain side effects like:

• Issues During Pregnancy And Breastfeeding

There is not enough information on this. So, stay safe and avoid use.

• Lung Failure

Use of BCAAs in patients with ALS (amyotrophic lateral sclerosis) has been linked to lung failure. Keep patients away from them.

• Liver Damage In Chronic Alcoholics

Use of BCAAs in alcoholics can lead to liver disease and subsequent brain damage.

• Abdominal Issues

Certain people experience bloating, diarrhea, and even abdominal pain with arginine supplements. Arginine also lowers blood pressure, and this can be a problem if you are already on blood pressure medication – your blood pressure might be lowered way too much.

• Impaired Blood Sugar Control (During Surgery)

Amino acids (including BCAAs) can interfere with blood sugar levels. This might interfere with blood sugar control during and after surgery. Stop taking amino acids at least two weeks before a scheduled surgery.

Conclusion

Amino acids constitute our body, which is why they must be an integral part of our diet. Start taking them today, and see your health changing for the better.

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Expert’s Answers for Readers Questions

When to take amino acids?

If you workout, the best time to take a supplement is pre and post your session. If you don’t (but we recommend you do), you can spread it across the day in the form of the food sources of amino acids. This way, you don’t have to rely on supplements.

What are the top amino acid supplement brands?