Amino Acids for Muscle Health

Supplementing with Protein’s Building Blocks

Our bodies use 20 different amino acids to form the proteins required for cells to function. Nine of these are essential amino acids, meaning they aren't made by our bodies and must be obtained through diet. The branched chain amino acids in this family of products encourage protein synthesis in skeletal muscle and liver, promote muscle function, support exercise performance and muscle recovery, and support healthy brain and immune function.

4 Reasons Why Everyone Should Take Our Amino Acids

  • Maintain muscle mass
  • Enhance exercise performance & recovery
  • Inhibit muscle soreness & fatigue
  • Promote mental clarity & focus
Best Seller

N-Acetyl-L-Cysteine (NAC)

Immune, respiratory & liver health all-star

600 mg, 60 capsules

  • $12.00
  • $10.80
  • Save 10%

Compare Formulations

Amino acids support a number of functions in the body, including muscle performance and recovery, but they aren’t just for athletes. Our supplements also support cognitive and immune system health. Find the form that fits you.

Branched Chain Amino Acids

The branched-chain amino acids (BCAAs) L-valine, L-leucine and L-isoleucine are essential nutrients that must be obtained through your diet. BCAAs are popular with fitness enthusiasts, because they help maintain and build muscle strength and endurance. They also support a healthy immune system.

See Branched Chain Amino Acids Products

Other Amino Acids

Amino acids have uses beyond fitness and immune health. They play a vital role in metabolism and maintaining a healthy nervous system. L-Theanine, an amino acid found in tea leaves, produces calming, mood-supporting benefits. Taurine (which we offer in capsule and powder form) and carnitine, an amino acid derivative, support a healthy heart and brain.

See Other Amino Acids Products

Whether you're an athlete in training, or a weekend warrior who just wants to up your game, BCAAs can help support optimal performance and exercise recovery.

In addition to supporting your fitness regimen, amino acids such as L-Theanine, L-Lysine, Taurine, Carnitine and others play a role in mood, immune health and more.

Related Products

What are amino acids?

Amino acids are the basic building blocks of life and are responsible for forming natural protein within the body. However, there are three amino acids that the body does not produce on its own. These "branched-chain" amino acids, or BCAAs, are leucine, isoleucine and valine. Aside from amino acid supplements, BCAAs can be found in protein-rich foods such as eggs, meat and dairy products.

Are amino acids good for muscles?

Yes, amino acids are good for you, especially if you are looking to support your body and muscles after you break a sweat.

If your goal is to support lean muscle mass, then amino acid supplements are for you. Specifically, the BCAA leucine activates protein synthesis in the body, which is responsible for promoting muscle mass.

Alternatively, if you are looking for a post-workout recovery, amino acid supplements have been shown to relieve occasional discomfort as well as promote healthy energy production after you hit the gym.

Which amino acid supplements should I take?

For supporting muscle recovery, it is important to incorporate a BCAA supplement into your wellness routine. Doing so will enhance exercise performance, recovery and support protein synthesis.

However, not all amino acids are for supporting muscle growth and development. The amino acid taurine helps support healthy heart function by helping maintain already healthy blood pressure and glucose levels.

Additionally, L-arginine is an amino acid that is naturally produced by the body, but some people struggle to get enough through diet. This amino acid helps maintain healthy tissues, bones, and healthy immune function.

Are there other amino acids for supporting muscle recovery?

If you are looking for additional amino acid support for lean muscle mass, health and recovery after exercise, turn to arginine ornithine. This amino acid powder specifically encourages healthy exercise recovery and lean muscle mass, while also supporting already-healthy blood pressure levels.



Answer a few questions to get custom supplement recommendations.

Life Extension - Why Do We Do It?

The Best Supplements Science Can Offer

When putting something in your body, you should be confident that you’re getting the nutritional benefits your body deserves. We've been delivering the highest-quality products—backed by science and formulated with the finest ingredients—for over 40 years.

What Matters to You, Matters to Us

We're committed to empowering you to live a healthier life. Whether it’s finding sustainable partners for our ingredients or funding the latest anti-aging research, we're all about your health & wellness.

Highly Recommended

98% of our customers recommend us to family and friends. We're very proud of that because our loved ones matter to us—and we're willing to bet you feel the same way.

Product Transparency

40 years of research dedicated to bringing you premium, scientifically-validated formulations.