What is L-Valine L-valine is an essential branched chain amino acid (BCAA) that is important in the maintenance of muscles. L-valine can be found in many foods such as leafy vegetables, meats, beans, milk, nuts, and mushrooms. It is most commonly taken in conjunction with other amino acids to assist in muscle recovery after strenuous exercise. L-Valine Benefits L-valine works together with the other amino acids to aid in exercise recovery.* It helps boost athletic endurance and assists in muscle maintenance.* L-valine also supports liver function and promotes a healthy gallbladder.*