HMB (B-Hydroxy B-Methylbutyrate) is a clinically researched, naturally occurring metabolite of the branched-chain amino acid leucine. HMB normally plays a role in the regulation of protein breakdown in the body, helping to preserve lean muscle tissue.* NOW HMB, therefore, can help to maintain muscle strength and mass when combined with regular exercise and a healthy diet.* In addition, it may help to enhance recovery from intense exercise.* Natural color variatioin may occur in this product. Non-GMO.