HMB supplements. β-Hydroxy β-methylbutyric acid (HMB) is a metabolite of the amino acid Leucine (a BBCA). HMB is a powerful anticatabolic agent as it has an important role in protein synthesis, increases strength, reduces muscle breakdown and recovery time. It increases protein synthesis, thanks to the stimulation of mTOR, and mitigates muscle damage provoked by the workout effects. HSNstore offers a wide range of HMB in different formats: powder, capsules and tablets. You can find it in salt form, as it is widely known, and HMB-FA free form, considerably researched in the past few years due to its effectiveness as an anticatabolic agent.