Beta-hydroxy beta-methyl butyrate (HMB) is a metabolite of the amino acid Leucine and is synthesized in the human body. When you train with weights, you stimulate protein synthesis.

However, protein breakdown is also increased.

HMB will limit the amount of protein breakdown that takes place following exercise.

This, in turn, should lead to greater muscle growth.

It has the ability to burn fat and build muscle consistently in response to exercise.

Most important HMB reduces muscle catabolism and may protect against muscle damage.