A Powerful Non-Hormonal Muscle Growth Stimulator! HICA-MAX is a powerful non-hormonal, natural stimulator of muscle growth. HICA-MAX chewables contain 100% high grade leucic acid, also known as alpha-hydroxy-isocaproic acid (HICA), a natural metabolite of the branched chain amino acid, leucine. HICA-MAX works by increasing protein synthesis (anabolism), and decreasing muscle protein breakdown (catabolism.) Its mechanism of action has been suggested as an independent mTOR signal transducer, which is a “cell-signaler” for muscle protein synthesis.