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Testosterone Supplementation for Aging-Associated Sarcopenia

Division of Endocrinology, Metabolism, and Molecular Medicine, Charles R. Drew University, Los Angeles, California.

Aging of humans is associated with a loss of muscle mass and function, and an increase in fat mass. Epidemiologic studies have demonstrated a correlation between bioavailable testosterone concentrations and fat-free mass and muscle strength. Testosterone replacement in older men with low testosterone levels increases fat-free mass and muscle strength, and decreases fat mass. However, we do not know whether testosterone replacement improves physical function and other health-related outcomes, or reduces the risk of disability, falls, or fractures in older men with low testosterone levels. The long-term risks and benefits of testosterone supplementation in older men are not known.

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