Description Product Color: Off White Maintains Muscle* With Vitamin D-3 Active Aging* 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.* HMB may also help to maintain muscle during periods of inactivity in older adults.* NOW® Double Strength HMB has twice the HMB (1,000 mg per tablet) as in our regular strength product (500 mg per capsule). **myHMB® is a registered trademark of TSI Group Co., Ltd. Patent # 8,815,280, # 9,259,430, # 9,539,224 and # 9,707,241. Natural color variation may occur in this product.