Hormone Therapy: Aging-Related Hormone Replacement Therapy and Supplementation.

Given their association with aging, growth hormone (GH), dehydroepiandrosterone (DHEA), and melatonin (N-acetyl-5-methoxytryptamine) have been evaluated as potential antiaging treatments. It has been hypothesized that declining endocrine function, specifically the decreases in hormone production and secretion seen with aging, plays a role in development of frailty. This physiologic decrease in hormone levels differs from a pathologic decrease due to a condition or disease. However, the signs and symptoms can be similar. Hormone replacement therapy is a well-established treatment for many conditions, but its role in the healthy aging process remains unclear. Off-label use of these hormones has shown some short-term benefits, such as improved body composition, mood, neurocognition, and sexual function and decreased oxidative stress. However, there are no recommendations for routine measurement of these hormone levels or for hormone replacement therapy because of a lack of high-quality evidence. Long-term studies are needed to evaluate the efficacy and safety of GH, DHEA, and melatonin if they are to be used as antiaging therapies.