Quick Navigation

Amino Acid

Nitrogen-containing structural units that make up peptides and proteins. There are 20 amino acids coded by our DNA and involved in protein synthesis, of which nine are essential and must be consumed in the diet.

Our evidence-based analysis on amino acid features 28 unique references to scientific papers.

Research analysis led by .
Reviewed by
Examine.com Team
Last Updated:

Amino Acid Summary

Amino Acid supplements are isolated amino acids or groups of isolated amino acids (as is the case with BCAAs) which are typically in lower doses than protein supplements and more specific.

Amino Acids are already consumed in the diet via dietary protein, but superloading specific amino acids in isolation may exert unique effects not found with food or protein supplement intake.

Amino Acids, in isolation, have a wide range of varying effects. They may either be naturally occurring amino acids (such as Taurine or Leucine) or can be slightly modified naturally occurring amino acids (as is the case with Beta-Alanine).

Get unbiased information on what works

At Examine.com, we pride ourselves on basing all our recommendations on evidence. It’s why we don’t sell any advertising or supplements — so that you know that our analysis is unbiased.

If you’re tired of wasting time and money on supplements that don’t work, our 17 Supplement Guides will help you figure out precisely what to take — and what to skip — based on your health goals and the latest scientific evidence.

Join over 50,000 people who rely on Examine.com's unbiased and science-based analysis.


I want unbiased recommendations »

Things to Note

Also Known As

Amino Acids

Do Not Confuse With

Protein Supplements

Tired of misinformation? Get unbiased info on supplements.

At Examine.com, our incentives line up with yours — getting unbiased information. It’s why we don’t sell any advertising or supplements.

Join over 250,000 people who’ve learned about effective versus overrated supplements, supplement buying tips, and how to combine supplements for safety and efficacy.

Click here to see all 28 references.