Does masturbation lower testosterone? Here's what the data says

What did @justin.houman.md actually say?

The core claim is straightforward: masturbation has "no impact on your testosterone levels." Dr. Houman, a board-certified men's health urologist, acknowledges that some men report feeling higher testosterone when abstaining, but frames this as a short-term blip with "zero long-term impact." He also flags a separate concern: frequent masturbation paired with heavy pornography use can contribute to porn-induced erectile dysfunction, which is a different issue from testosterone altogether. To his credit, he kept these two things distinct rather than conflating them, which is more than most creators do.

The video appears aimed at young men who are already anxious about their testosterone, and it's doing the reasonable thing: deflating a myth that has no serious scientific support. That earns it some goodwill before we dig into the nuances.

Does the science back this up?

Largely, yes. The evidence that masturbation meaningfully suppresses long-term testosterone is essentially nonexistent. Testosterone regulation follows a tightly controlled HPG axis, meaning the hypothalamus, pituitary, and testes operate in a feedback loop that isn't going to be derailed by ejaculation frequency.

A frequently cited study by Exton et al. (2001, European Urology) found no significant difference in serum testosterone levels between men who masturbated to orgasm and a control group. A smaller, more contested paper by Jiang et al. (2003, Journal of Zhejiang University Science) observed a modest testosterone rise after 7 days of abstinence, which then returned to baseline. This is likely what Dr. Houman is referencing when he mentions the short-term increase some men notice. That study had methodological limitations and a tiny sample size, so extrapolating lifestyle advice from it would be a stretch.

Anecdotally, the "NoFap" community has built an entire subculture around the idea that abstinence raises testosterone dramatically. The clinical data does not support this narrative at a meaningful physiological level.

What did they get wrong (or right)?

Dr. Houman got the testosterone claim right. Where things get murkier is the porn-induced erectile dysfunction claim. He states that masturbating "more frequently for long periods of time" with pornography "can negatively impact" erectile function. This is a real and debated area of sexual medicine.

The concept of porn-induced ED is not universally accepted in clinical literature. Researchers like Prause et al. have pushed back on the model, arguing the evidence is correlational and confounded by anxiety, relationship factors, and pre-existing mental health conditions. A 2021 review in Sexual Medicine Reviews by Grubbs and colleagues found that "perceived addiction to pornography" and psychological distress were stronger predictors of erectile complaints than actual pornography consumption volume.

That doesn't mean the phenomenon is fake, but the mechanism Dr. Houman implies, that frequency plus pornography directly causes erectile dysfunction, is oversimplified. Desensitization and dopaminergic adaptation are plausible theories, but the clinical evidence is still developing. He should have flagged that uncertainty rather than presenting it as settled.

What should you actually know?

If you're a young man worried about your testosterone, masturbation frequency is genuinely not the variable you should be tracking. The actual drivers of low testosterone are worth knowing: obesity, sleep deprivation, chronic psychological stress, alcohol use, and certain medications including opioids and anabolic steroids all have documented, measurable effects on testosterone production.

A study by Leproult and Van Cauter (2011, JAMA) found that just one week of sleep restriction to five hours per night reduced testosterone levels by 10 to 15 percent in young healthy men. That's a real effect, and it dwarfs anything masturbation could plausibly do.

If you're experiencing symptoms of low testosterone, including fatigue, reduced libido, difficulty with erections, or mood changes, the appropriate step is a morning serum total testosterone test, not a NoFap challenge. Telehealth platforms that offer hormone evaluation can be a reasonable starting point, but diagnosis requires actual lab work, not symptom questionnaires alone.

• Low testosterone is clinically defined as total testosterone below 300 ng/dL with symptoms present.
• A single lab result is not enough. Guidelines recommend at least two morning measurements before diagnosing hypogonadism.
• Erectile dysfunction in young men is more commonly tied to performance anxiety, cardiovascular risk factors, or psychological causes than to testosterone deficiency.