NOW Foods Branched Chain AMino Acids are US Pharmaceutical grade. The branced chain amino acids (BCAA's) leucine, isoleucine and valine are three of the eight essential amino acids the human body must recieve in food and cannot synthesize in amounts sufficient to meet physiological needs.

Ingredients:
L-Leucine (free form)...400mg
L-Isoleucine (free form)...250mg
L-Valine (free form)...270mg

Other ingredients: Gelatin, Magnesium Stearate, Silica. Contains no additives, corn, wheat, soy, milk and yeast.