Valine is another essential amino acid.  It is useful for muscle metabolism, tissue repair, and is useful for balancing the level of nitrogen in the system.  Valine is known to have stimulative characteristics.  It is found in significant quantities in muscle tissue and is there as a source of energy to the muscle.  It is useful as a supplement in the correction of damage to the system, in the form of imbalances in the amino acids due to drug addiction.

Sources are valine in food include:  mushrooms, meat, grains, dairy products, peanuts, and soy protein.  Supplemental L.-valine should always be taken in balance was to other branched-chain amino acids, L.-Isoleucine and L.-Leucine.