HMB (ß-Hydroxy ß-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.* 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.* NOW® Double Strength HMB has twice the HMB (1000 mg per tablet) as in our regular strength product (500 mg per capsule). Nutritional uses of Calcium ß-Hydroxy ß-Methylbutyrate Monohydrate HMB are licensed to NOW Health Group Inc. Use of the trademark myHMB® is licensed from Metabolic Technologies. Natural color variation may occur in this product.