NutraBio HMB is a clinically proven ergogenic aid that has been shown in over 50 human studies to improve strength and power gains, increase lean mass, and aid recovery. HMB (short for beta-hydroxy beta-methylbutyrate) in an active metabolite of leucine that has both anticatabolic and anabolic properties.  Due to these attributes HMB reduces muscle protein breakdown while also inducing muscle protein synthesis. This means HMB can lead to rapid strength gains in less time, significantly increase lean muscle mass, support more complete muscle recovery, and reduce muscle damage from resistance exercise.