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Answer:

HMB (hydroxy methylbutyrate) is produced by the body when muscle tissue breaks down, such as during training. It is hypothesized that HMB supplements may signal the body to slow the breakdown of muscle tissue. Based on this, HMB has been studied for its effects on weight training and reversing muscle loss and muscle wasting conditions.

Sign in as a ConsumerLab member to see the evidence for and against HMB for various conditions. Also learn about safety concerns with other weight training supplements.

Be sure to check out our Reviews of other muscle-related supplements, including BCAAs (branched-chain amino acids),creatine, HMB and taurine. Also see our Reviews of other supplements for muscle, including L-glutamine, vitamin D, protein powders, and "nitric oxide" supplements.

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