Klean Essential Aminos + HMB provides a great-tasting, leucine-rich blend of essential amino acids combined with HMB^®, vitamin D₃, and glutamine for muscle mass and function. Leucine, a branched-chain amino acid, has an anabolic role in muscle protein synthesis and may specifically benefit athletes by preserving healthy muscle mass and muscle function. ss-Hydroxy-ss-methylbutyrate (HMB) is a metabolite of leucine that supports lean muscle mass through two unique mechanisms: decreased muscle breakdown and increased protein synthesis. Vitamin D and glutamine provide additional support for muscle health.^‡