Optimum Nutrition HMB (Beta-Hydroxy Beta-Methylbutyrate) is a dietary supplement that is often used by athletes, bodybuilders, and fitness enthusiasts to support muscle growth, strength, and recovery. HMB is a metabolite of the essential amino acid leucine and is believed to have beneficial effects on muscle protein synthesis and muscle tissue

• HMB can stimulate protein synthesis and decrease catabolic muscle damage
• Helps support muscle protein synthesis
• Aids in building lean body mass
• Supports muscle strength to help you dominate in the gym