Can Sleep Apnea Cause Low Testosterone in Men?

Yes, sleep apnea and low testosterone are closely linked in men. Research reviews find that men with obstructive sleep apnea tend to have lower testosterone than men without it, and the gap is largest in severe cases. Short, broken sleep may also lower testosterone on its own, so the two are worth measuring together.

Last reviewed: October 2026.

Can sleep apnea cause low testosterone?

Sleep apnea is strongly associated with lower testosterone, though research has not proven that one simply causes the other. A 2022 systematic review in Andrology pooled 18 studies covering 1,823 men and found a significant inverse association between obstructive sleep apnea and serum testosterone. The link held after adjusting for age and body mass index.

Severity appears to matter. In the same review, testosterone was clearly lower in men with severe sleep apnea, while the differences in mild and moderate cases did not reach statistical significance.

What the research does not settle is direction. Weight, age and metabolic health all affect both conditions, which is one reason the two tend to show up in the same man at the same time.

Why would poor sleep lower testosterone?

Testosterone is produced on a daily rhythm, and that rhythm is closely tied to sleep. When sleep is cut short or repeatedly interrupted, the hormone signal that supports testosterone production may be disrupted.

The clearest evidence comes from a small, controlled study at the University of Chicago, published in JAMA. Ten healthy young men spent a week sleeping five hours a night in a lab. Their daytime testosterone fell by 10 to 15 percent. The authors noted that normal aging lowers testosterone by about 1 to 2 percent per year.

That study involved young men without sleep apnea, so it does not describe apnea directly. It does show how quickly short sleep alone can move the number. Sleep apnea adds two further stressors: repeated drops in oxygen and frequent brief awakenings that the sleeper rarely remembers.

Many executives in Hinsdale, Oak Brook and Naperville run short on sleep during demanding stretches, before apnea is even considered.

Does low testosterone make sleep apnea worse?

The relationship may run both ways. Lower testosterone is associated with weight gain, particularly around the midsection, and excess weight is one of the main risk factors for obstructive sleep apnea. More weight can mean more airway obstruction at night, more broken sleep, and further pressure on hormone levels.

This is why many men experience it as a loop rather than a single problem. They sleep poorly, feel flat, gain weight more easily, and sleep worse again. Breaking the loop starts with knowing which parts of it are actually present.

How do the symptoms of sleep apnea and low testosterone overlap?

The symptoms of sleep apnea and low testosterone overlap so much that it is hard to tell them apart without testing. Both can show up as afternoon fatigue, low drive and slower recovery. The table below shows where they converge and where they differ.

Symptom	Common with sleep apnea	Common with low testosterone
Daytime fatigue	Yes	Yes
Reduced interest in sex	Yes	Yes
Trouble focusing	Yes	Yes
Mood changes or irritability	Yes	Yes
Loud snoring or gasping at night	Yes	Not typical
Morning headaches or dry mouth	Yes	Not typical
Loss of muscle, more body fat	Indirectly, through weight	Yes

According to Mayo Clinic, the night signs that point toward sleep apnea include loud snoring, pauses in breathing that a partner notices, and waking up gasping or choking. Daytime signs include excessive sleepiness, morning headaches and decreased interest in sex. Mayo Clinic lists excess weight, older age and male sex among the main risk factors.

If you recognize yourself in both columns, you are not unusual. That overlap is exactly why guessing tends to fail. For a broader look at fatigue in this age group, see our guide on why men over 40 feel tired even after a full night’s sleep.

Does treating sleep apnea raise testosterone?

The evidence on whether treating sleep apnea raises testosterone is mixed. A 2014 meta-analysis in PLOS ONE pooled 7 studies of 232 men and found no significant change in total testosterone after CPAP treatment, including in men treated for more than three months. The authors called for larger, well-designed trials.

That does not make treating apnea pointless. Sleep apnea is evaluated and managed for its own reasons, including its links to blood pressure and cardiovascular health. It simply means a man should not assume that fixing one side of the picture will automatically correct the other. Both sides need to be measured.

Is testosterone therapy safe if you have sleep apnea?

Sleep apnea is one of the specific conditions guidelines flag before testosterone therapy is considered. The Endocrine Society’s clinical practice guideline recommends against starting testosterone therapy in men with untreated severe obstructive sleep apnea, along with several other conditions.

The same guideline recommends that low testosterone be diagnosed only when symptoms are present and morning fasting testosterone is consistently low on repeat testing. In other words, sleep belongs in the evaluation before any hormone decision is made. Any treatment requires an evaluation and a prescription from a licensed provider.

If you have already been told your testosterone is low, our article on why testosterone levels drop in men covers the other common causes worth ruling out.

Should men test for sleep apnea and low testosterone together?

Testing for sleep apnea and low testosterone together gives a clearer answer than testing either one alone. A blood panel can show where testosterone and related hormones sit. A sleep study can show whether breathing is interrupted at night and how often. Read side by side, the two help explain which factors are driving how you feel.

Testing makes particular sense if any of these apply:

• A partner has noticed loud snoring or pauses in your breathing.
• You wake unrefreshed despite spending enough time in bed.
• Your energy, drive or focus has declined over months, not days.
• You have gained weight around the midsection that is hard to shift.
• You have been offered testosterone therapy without a sleep evaluation.

How Alpha Refinery Approaches This

Alpha Refinery is an expert-led men’s performance medicine clinic in Hinsdale, with physician medical oversight. Our view is simple: diagnose first, treat second.

For men who suspect both sleep and hormones are involved, the Alpha Performance and Sleep Assessment pairs our blood panel with an at-home sleep study. The blood side measures 61 biomarkers, including testosterone and related hormones, drawn and run in our own CLIA-certified lab. The sleep side looks at what happens to your breathing overnight.

Our clinical team reads the results together rather than in isolation. Key available findings are reviewed during the visit, with remaining results shared as they become available. From there, any next step is evaluated by our clinical team and set out in a 90-day clinical protocol.

Men who want to start with blood work and body composition alone can begin with the Alpha Performance Assessment. Men focused specifically on hormones can review our testosterone evaluation.

Where to Start

If you are not sure whether sleep, hormones or something else is behind how you feel, take the free Alpha Score. It is a two-minute self-check that shows which areas may be worth measuring. When you want answers rather than guesses, the Alpha Performance Assessment is one private 90-minute visit with nothing due to book. Choose Your Time, or call 630-242-1330.

Common Questions

Can sleep apnea lower testosterone in men?

Research reviews consistently find lower testosterone in men with obstructive sleep apnea, especially in severe cases. Studies show an association, not proof of direct cause, because weight and age influence both.

Will a CPAP raise my testosterone?

Not reliably. A meta-analysis of 232 men found no significant change in total testosterone after CPAP treatment. Sleep apnea is still treated for its own health reasons.

How much does lack of sleep affect testosterone?

In one controlled study, healthy young men who slept five hours a night for a week saw daytime testosterone fall by 10 to 15 percent. The study was small, but it shows short sleep alone may lower levels.

Can low testosterone cause sleep problems?

It may contribute. Lower testosterone is associated with weight gain, and excess weight is a leading risk factor for obstructive sleep apnea, which can create a cycle of poor sleep and low energy.

Should I get a sleep study before testosterone therapy?

Guidelines from the Endocrine Society recommend against starting testosterone therapy in men with untreated severe obstructive sleep apnea. Whether a sleep study is appropriate for you is decided by a licensed provider after an evaluation.

What is the difference between sleep apnea fatigue and low testosterone fatigue?

From the inside, they can feel almost identical. Night signs such as snoring or gasping point toward sleep apnea, while changes in muscle and body fat point toward hormones. Testing is the reliable way to tell them apart.

Key Takeaways

• Men with obstructive sleep apnea tend to have lower testosterone, most clearly in severe cases.
• Short sleep alone lowered daytime testosterone by 10 to 15 percent in a controlled study of young men.
• The relationship likely runs both ways, with weight as a shared driver.
• CPAP has not been shown to reliably raise testosterone, so both sides need to be measured.
• Guidelines flag untreated severe sleep apnea before testosterone therapy is considered.

This article is for general education and is not medical advice. Treatment decisions are made by a licensed provider after an evaluation.