Research

Hormonal

Testosterone replacement therapy (TRT) improves sexual function, libido, bone mineral density, muscle mass, mood, and cognition in men with documented hypogonadism, provided symptoms and low serum testosterone levels are present.

If you are an older man experiencing low libido, fatigue, loss of muscle mass, or mood changes, do not assume these are just signs of aging. Get your testosterone levels checked, especially if you have symptoms. If both your levels are low and you have symptoms, TRT may improve your quality of life, sexual function, and bone health. However, it is not a magic bullet for physical function or falls, and you should discuss the risks and benefits with your doctor.

ModerateSupportsMEDIUM confidence
Restoring testosterone levels to within the normal range by using testosterone replacement therapy can improve many of the effects of hypogonadism. Most importantly, these include beneficial effects on mood, energy levels and patients’ sense of well-being, sexual function, lean body mass and muscle strength, erythropoiesis and bone mineral density (BMD), cognition and some benefits on cardiovascular risk factors.
John E. Morley · Therapeutics and Clinical Risk Management · 2009

Why this rating

The paper is a review citing mixed results from randomized controlled trials and observational studies, noting that large-scale long-term studies are lacking.

Source

The benefits and risks of testosterone replacement therapy: a review

John E. Morley · Therapeutics and Clinical Risk Management · 2009

DOI 10.2147/tcrm.s3025

narrative_reviewCited 335×
Read the paper
DOI resolved against Crossref · corpus check 2026-06-10

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