After age 30, muscle loss begins, and by 40, the effects accelerate. This process, known as sarcopenia, results in a loss of 3% to 5% of muscle mass every decade without intervention. By the time men ...

Aging in men is associated with an increase in body fat, particularly in the abdomen. Similar effects on body composition are seen in individuals with hypogonadism or growth-hormone deficiency, and ...

Demand for the hormone is surging, and not just to treat libido. Here’s what we know about its benefits, and potential risks. By Danielle Friedman Five years ago, when Dr. Risa Kagan offered ...