Amino Acids - Leucine - Source

Oatmeal is an excellent source of leucine, at 106mg per gram of protein. Skim milk rates second at 96.6mg/g. Brown rice and cooked soy beans roughly tie for third at 87.2 and 85mg/g respectively.

Leucine is found in beans, chicken, dairy products, oats, poultry, red meats, soy flour, wheat germ, and whole wheat.

It is also available in supplement form, as part of a multi-amino acid complex, protein powder, or in isolated form.