Does Testosterone Improve Sleep? The Largest Trial Says No

Testosterone treatment did not improve sleep quality in the largest trial ever run — in any group examined. TRAVERSE measured it across all 5,204 participants, in the 2,643 men with depressive symptoms, and in men with and without them. Mood and energy improved modestly. Sleep did not move.[1]

That is worth knowing before you start, because the relationship between sleep and testosterone is real — it just does not run in the direction most men assume.

The direction of cause

Most testosterone is produced during sleep, released in pulses that track the sleep cycle. Break the sleep and you reduce the production. This is why short or fragmented sleep lowers morning testosterone measurably.

So when a man arrives with poor sleep and low testosterone, the more common story is that the sleep problem is upstream. Treating the hormone leaves the cause running.

Sleep apnea is the one to rule out

Obstructive sleep apnea deserves separate attention because it sits at the centre of this problem in three ways at once:

1. It is common in exactly this population — men over 40, particularly with higher body weight.
2. It independently suppresses testosterone through repeated oxygen desaturation and fragmented sleep architecture.
3. Testosterone therapy can worsen it. Severe untreated OSA is a recognised caution before starting treatment, and screening for it is standard practice.[2]

That third point is the one that changes the order of operations. If you snore heavily, wake unrefreshed, or have been told you stop breathing at night, apnea should be assessed before testosterone therapy rather than after.

What poor sleep does that looks like low testosterone

The overlap is why this is hard to untangle without testing. Chronic short sleep produces:

• Daytime fatigue that a full night does not fix
• Reduced motivation and irritability
• Difficulty concentrating and slowed processing
• Increased appetite and weight gain over time
• Reduced libido

Every one of those also appears on a low-testosterone symptom list. A blood panel separates them; guessing does not.

What to do with this

If sleep is the main complaint, treat the sleep. Get apnea ruled out, and address the behavioural side — consistent timing, and alcohol, which fragments sleep architecture even when it shortens the time to fall asleep.

If testosterone is genuinely low, treat it for the things treatment actually does. Sexual function has the strongest evidence, mood improves modestly, and sleep — on the trial evidence — does not change.

If both are present, they need addressing in parallel. Neither is a substitute for the other.

Frequently asked questions

My sleep got better on TRT. Does that contradict the trial? Not necessarily. Individual experience varies, and better mood or energy can make sleep feel better without changing sleep quality as measured. What the trial rules out is a reliable, population-level improvement in sleep quality that you can count on in advance.[1]

Can low testosterone cause insomnia? Low testosterone is associated with poorer sleep, but the association is not proof of direction, and correcting the hormone did not improve sleep in the trial. Persistent insomnia deserves its own assessment.

Should I get a sleep study before starting testosterone? If you have symptoms suggesting apnea — snoring, witnessed pauses, waking unrefreshed — that is the standard recommendation, because untreated severe OSA is a caution for therapy.[2]

Where to start

If poor sleep sits alongside fatigue, low mood, or reduced libido, both a hormone panel and a sleep assessment are reasonable — and the sleep question should not wait for the hormone result.

Keen connects you with a licensed clinical team for a telehealth consultation and lab review. If your testosterone is clinically low, treatment is Keen Testosterone Spray Rx — a once-daily topical spray powered by Hypospray® transdermal delivery.

Related reading in this series: low testosterone and fatigue and testosterone and depression.

References

2 sources

1. Bhasin S, Seidman S, Travison TG, et al. Depressive Syndromes in Men With Hypogonadism in the TRAVERSE Trial: Response to Testosterone-Replacement Therapy. J Clin Endocrinol Metab. 2024;109(7):1814–1826. doi:10.1210/clinem/dgae026 · PMID 38205962
2. Bhasin S, Brito JP, Cunningham GR, et al. Testosterone Therapy in Men With Hypogonadism: An Endocrine Society Clinical Practice Guideline. J Clin Endocrinol Metab. 2018;103(5):1715–1744. doi:10.1210/jc.2018-00229 · PMID 29562364