Muscularity is a branched-chain amino acid (BCAA) capsule. This formula has been specifically designed for use with meals when following a calorie-restricted diet. In addition to the BCAAs leucine, isoleucine, and valine, it contains vitamin B6, vitamin B12, biotin, chromium picolinate, and zinc picolinate. These nutrients support energy metabolism and healthy insulin action. Anecdotally, zinc picolinate has been used to help clear up the skin (e.g. acne).