Beta-hydroxy-beta-methylbutyrate, commonly known as HMB, is a compound that the body produces from the amino acid leucine. It is often used as a dietary supplement to support muscle health, particularly in individuals engaged in intense exercise or those experiencing muscle wasting. Research suggests that HMB may help reduce muscle breakdown, enhance recovery, and improve strength in athletes. It is also studied for its potential benefits in older adults to prevent muscle loss associated with aging. HMB is generally considered safe when taken in recommended doses.