|Formula C6H12O3||Molar mass 132.1577 g/mol|
2-Hydroxyisocaproic acid (HICA or leucic acid) is a metabolite of the branched-chain amino acid leucine. It is commonly sold as a purported muscle building supplement. It also has fungicidal properties. HICA was shown to increase protein synthesis and muscle mass in rats who were recovering from a period of induced atrophy.