Beta-Hydroxy Beta-Methylbutyric Acid (HMB) is an active metabolite of the branched chain amino acid leucine, and important for muscle health. Leucine is found in foods such as fish, meat, dairy, legumes, nuts and seeds, but only a small amount will contribute to HMB in the body. It is used by the body to build, maintain and repair muscle cells.
Research has shown that supplementing the diet with HMB can improve exercise performance by supporting muscle cell repair and adaptation. It has also been shown to speed strength and muscle mass gains as well as improve endurance performance.