Loading... Please wait...University studies have shown that when highly trained athletes supplement their diets with HMB (a metabolite of the amino acid Leucine), they gain significantly more lean mass and strength than athletes using a placebo. Scientists believe that HMB may produce an anti-catabolic effect by suppressing protein breakdown that follows intensive exercise. By reducing muscle tissue breakdown, HMB may reduce recovery time and increase your muscle-building results. Two studies have also now shown that HMB may help accelerate fat loss that occurs secondary to strenuous exercise. Bodybuilders are now using HMB to reduce muscle soreness, speed recovery, and boost muscle growth. For best muscle-building results, use HMB on a daily basis, for a minimum of 4 weeks.