Longevity & Aging · Metabolic & Cardiometabolic
testosterone therapy improves sexual function
In plain terms: Does testosterone therapy improve sex drive and function?
Part of: 💊 Testosterone therapy (TRT)
For men with genuinely low testosterone, yes — it's one of the most reliable benefits, especially for libido and sexual desire. The effect on erections specifically is more modest, so it's not a stand-alone ED treatment. It does little for men whose testosterone is already normal.
📅 Last reviewed: 2026-07-14 ⓘ
Evidence ladder
How far up the ladder this claim has climbed. A high consensus on a low rung means "consistent so far," not "proven in people."
Top evidence so far: All trials, pooled (Meta-analysis)
How the studies fall
What the evidence shows
For men with genuinely low testosterone, TRT improves sexual function — this is among its most consistent benefits, backed by the Testosterone Trials, the TRAVERSE sexual-function study, and multiple meta-analyses.
The evidence (14)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| Canal de Velasco LM et al 2026 · study_type: meta-analysis | RCT | supports | moderate | Systematic review synthesizing 11 RCTs (>600 men, including hypogonadal and eugonadal) found sexual function and quality of life 'consistently improved across studies' with testosterone therapy vs placebo/standard care. |
| Corona G et al. 2014 · Eur Urol | meta-analysis | mixed | moderate | Meta 41 RCTs: improved erectile function/libido in hypogonadal men, but effect strongest in industry-supported trials (publication-bias concern). |
| Corona G et al. 2017 · J Sex Med | meta-analysis | supports | high | Meta 14 RCTs (n=2298): improved IIEF erectile-function domain (MD +2.31) and libido; greater with more severe hypogonadism. |
| Amiaz R et al. 2011 · J Sex Marital Ther | RCT | supports | low | RCT (depressed men on SSRIs): testosterone gel improved IIEF sexual-function scores vs placebo. |
| Hackett G et al. 2017 · J Sex Med | RCT | supports | moderate | RCT (T2DM men): improved sexual desire (6wk) and erectile function (30wk), greatest in severe hypogonadism. |
| Constantinou BT et al 2026 · study_type: meta-analysis | meta-analysis | supports | moderate | Meta-analysis (11 studies, 1512 patients) of clomiphene vs TRT in male hypogonadism found TRT produced better post-treatment libido scores (ADAM 1-5) than clomiphene (MD -0.54, 95% CI -0.87 to -0.21, p=0.009), with low heterogeneity (I2=18. |
| Corona G et al. 2020 · Andrology | mechanism | supports | low | Review: TRT improves erectile function/libido in men with total T <12 nmol/L. |
| Paduch DA et al. 2015 · J Clin Endocrinol Metab | RCT | tested-null | moderate | RCT: testosterone solution did not significantly improve ejaculatory dysfunction vs placebo. |
| Ponce OJ et al. 2018 · J Clin Endocrinol Metab | meta-analysis | supports | moderate | Meta 4 RCTs (n=1779): small but significant gains in libido (SMD 0.17), erectile function (0.16), satisfaction (0.16). |
| Seminara G et al 2026 · study_type: RCT | RCT | supports | low | Pilot study (n=10) in obese hypogonadal men added testosterone undecanoate to tirzepatide in 'late responders'; combined group showed significantly better erectile function (IIEF-5 23.2±2.1 vs 18.0±1.5, p<0.001) than tirzepatide alone at 6 |
| Snyder PJ et al. 2016 · N Engl J Med | RCT | supports | high | Testosterone Trials (>=65y): significantly increased sexual activity, desire, and erectile function. |
| Cruickshank M et al. 2024 · Nat Med | meta-analysis | supports | high | IPD meta 35 trials (n=5601): TRT improved sexual function and QoL across almost all subgroups. |
| Pencina KM et al. 2024 · JAMA Netw Open | RCT | supports | high | TRAVERSE Sexual Function Study (n=1161): TRT improved sexual activity, desire, hypogonadal symptoms over 24 months; erectile function NOT significantly improved. |
| Isidori AM et al. 2005 · Clin Endocrinol (Oxf) | meta-analysis | supports | moderate | Meta 17 RCTs: improved erections/sexual thoughts/intercourse success in men with baseline T <12 nmol/L; no effect in eugonadal men. |
Disagree, or know a study we missed?
We grade by evidence, not opinions. The way to weigh in is to point us to a study we haven't cited (check the evidence table above first), or to flag a problem with one we have. Every submission is reviewed; if it holds up, the grade updates and shows in Science Changes Its Mind.
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Educational only, not medical advice. Grades and scores reflect published evidence weighted by study design and quality; see the methodology.