Now Foods, HMB Double Strength, 1000 mg, 90 TabsProduct Description Preserves Lean Mass Enhances Recovery A Dietary Supplement Vegetarian Vegan Non GMO GMP Quality Assured Product Benefits HMB (B Hydroxy B Methylbutyrate) naturally occurring metabolite of the branched chain amino acid leucine. HBM normally plays a role in the regulation of protein breakdown in the body, helping to preserve lean muscle tissue. HMB therefore can help to maintain muscle strength and mass when combined with regular