Exercise

  1. Home
  2. Health
  3. Exercise

Amino Acids

By Paige Waehner, About.com

Updated: May 27, 2005

About.com Health's Disease and Condition content is reviewed by our Medical Review Board

Definition: Amino acids are known as the building blocks of protein. They perform many important functions such as: building cells, protecting the body from viruses or bacteria, repairing damaged tissue and carrying oxygen throughout the body.

There are two kinds of amino acids: essential and non-essential. Essential amino acids are those that can't be produced in the body, so you get these from foods or supplements. The eight essential amino acids include:

Isoleucine
Leucine
Lysine
Methionine
Phenylalanine
Threonine
Tryptophan
Valine
Serine

Some of these essential amino acids can be found in wheat, corn, beans, rice, beef and whey.

Non-essential amino acids are those that are produced within the human body. These include: Alanine
Asparagine
Aspartic Acid
Cysteine
Glutamic Acid
Glutamine
Glycine
Proline
Tyrosine
Arginine
Histidine

Explore Exercise

About.com Special Features

Do I Have Allergies?

Are your symptoms merely irritating, or could they be a sign of allergies? More >

Preventing Headaches

The best way to treat a headache is to prevent it. Learn how. More >

We comply with the HONcode standard for trustworthy health information: verify here.

Exercise

  1. Home
  2. Health
  3. Exercise
  4. Nutrition
  5. Amino Acids

©2009 About.com, a part of The New York Times Company.

All rights reserved.