Research

Hormonal

Testosterone replacement therapy (TRT) restores serum testosterone to normal ranges, thereby improving mood, energy, sexual function, lean body mass, erythropoiesis, and bone mineral density in hypogonadal men.

If you have clinically low testosterone and symptoms like low energy, low libido, or loss of muscle mass, TRT can restore your levels to normal and improve these symptoms. There are many forms of treatment (gels, patches, injections, buccal tablets) to suit your preference. Regular monitoring of your prostate and blood counts is essential to ensure safety.

GoodSupportsHIGH confidence
Using testosterone replacement therapy to restore testosterone to within the normal range for young adult men [>= 10-35 nmol/l (2.88-10.00 ng/ml)] can improve many of the effects of hypogonadism. Most importantly, these include beneficial effects on mood and energy levels, thereby improving patients' sense of well-being, sexual function (especially libido, but also erectile function if this is related to hypogonadism), lean body mass, erythropoiesis (improving anaemia if present and due to hypogonadism) and bone mineral density (BMD).
Eberhard Nieschlag et al. · Human Reproduction Update · 2004

Why this rating

The paper cites multiple studies (Snyder, Kenny, Nieschlag) showing consistent benefits, though it notes some variability in lipid responses.

Source

Testosterone replacement therapy: current trends and future directions

Eberhard Nieschlag et al. · Human Reproduction Update · 2004

DOI 10.1093/humupd/dmh035

narrative_reviewCited 224×
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DOI resolved against Crossref · corpus check 2026-06-10

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