Low Testosterone and Muscle Mass

Loss of muscle is called muscle wasting, and it’s a late sign of low testosterone. But even before you notice muscle wasting, you may feel weaker and less energetic,” says Ronald Tamler, MD, director of the Mount Sinai Diabetes Center in New York and an associate professor of medicine, endocrinology, diabetes, and bone disease at the Icahn School of Medicine at Mount Sinai in New York City. “Muscle cells have receptors for testosterone called androgen receptors. When testosterone binds to the receptors, muscle fibers are maintained. Without testosterone, maintenance stops and muscle is degraded.”