Semen Retention and Testosterone: Evidence vs Claims

“Testosterone rises by almost 50% on day seven.” You’ve probably seen a version of this claim in a video, a forum post, or an infographic. It’s specific, memorable, and makes semen retention sound scientifically proven.

The problem is where it comes from. This guide traces the claim to its source, reviews what other research shows, and explains what actually influences testosterone.

#Where the day-7 claim comes from

The claim is based on a study published in 2003 in a Chinese university science journal. Researchers measured serum testosterone in 28 men during periods of abstinence and reported a peak on the seventh day, at around 146% of baseline, after which levels didn’t keep rising (Jiang et al., 2003).

For years, this study was the backbone of the “abstinence boosts testosterone” argument. Then, in December 2021, the journal retracted the article. A retracted study is one that a journal has formally withdrawn from the scientific record. It should not be used as evidence, whatever the reason for the retraction.

Even before the retraction, the study wouldn’t have supported the strongest online claims. It described a temporary peak, not a lasting increase, and it said nothing about muscle, mood, energy, or attraction.

#What the remaining evidence shows

The most frequently cited remaining study is a small experiment from 2001. Researchers measured hormones in ten healthy men during sexual arousal and masturbation, before and after a three-week period of abstinence (Exton et al., 2001). They found:

• Orgasm itself didn’t change testosterone levels in the blood.
• Testosterone concentrations were higher after the three weeks of abstinence than before it.
• Orgasm increased prolactin, heart rate, and blood pressure, both before and after abstinence.

That’s a real finding, and it’s fair to say that a few weeks of abstinence may raise testosterone somewhat in the short term. But consider the limits:

• Ten participants is a very small sample.
• Three weeks tells us nothing about months or years of retention.
• The study didn’t measure outcomes like strength, mood, motivation, or attractiveness.
• Normal testosterone varies across the day and between people, so a modest difference in a lab doesn’t necessarily mean a noticeable change in life.

#Why “more testosterone” isn’t the whole story

Online content often treats testosterone as a simple dial: higher is always better, and abstinence turns it up. Reality is more complex.

Testosterone matters for sexual function, muscle, bone, energy, and mood. But healthy men have a wide normal range, levels change through the day, and they are influenced by factors such as sleep, body weight, age, illness, and some medications. For most healthy men, small short-term fluctuations within the normal range aren’t something you’d feel.

Very high testosterone isn’t automatically better either. The goal for health is a level in the normal range for your age, not the highest possible number.

#Does ejaculation lower testosterone?

There’s no good evidence that ejaculation meaningfully lowers testosterone. In the 2001 study, orgasm didn’t change testosterone at all. Masturbation is described by medical sources as a normal part of sexual health (Cleveland Clinic), not as a hormonal drain.

#What about fertility?

Abstinence does change semen: longer abstinence increases semen volume and sperm count, while some measures of sperm quality tend to be better with shorter abstinence (Hanson et al., 2018). That’s relevant if you’re doing a fertility test, and your clinic will tell you how long to abstain beforehand. It’s not evidence of a testosterone effect.

#If you’re worried about low testosterone

Symptoms people associate with low testosterone, such as low energy, low libido, low mood, or erection problems, can have many causes, including poor sleep, stress, depression, other medical conditions, and medications. Guessing is unreliable, and so is trying to fix it with abstinence.

#What actually helps your hormones and energy

For general health, doctors commonly recommend habits that also make every challenge easier:

• Sleep: aim for 7 or more hours on a regular schedule.
• Exercise: include both strength training and regular movement.
• Body weight and nutrition: eat in a way that supports a healthy weight.
• Stress: build regular recovery into your week.
• Alcohol: keep it moderate or skip it.

These habits have broad evidence for health and well-being, and they don’t depend on any particular sexual practice.

#Why the claim persists

Retractions rarely travel as fast as the original claim. The day-7 number is simple and motivating, it was shared widely for nearly two decades, and many videos and articles still repeat it without mentioning the retraction. Part of building discipline is building good information habits too: when a claim sounds too neat, check where it comes from.

#How to check a hormone claim yourself

You’ll keep meeting confident claims about hormones online. A few questions will tell you most of what you need to know:

1. What is the source? A named study, a medical organization, or just “studies show”? No source is a red flag.
2. Is the study still standing? Search the title with the word “retracted.” It takes ten seconds.
3. Who was studied, and how many? Ten or twenty people can hint at an effect, but can’t settle a question.
4. How long did it last? A change over a few days or weeks says little about months or years.
5. What was actually measured? A hormone level in a blood test is not the same as strength, mood, or confidence.
6. Does the claim match the size of the finding? “Somewhat higher in a small sample” and “your testosterone will soar” are very different statements.

We apply the same questions to every source on this site. You can read how in our evidence policy, and see the wider picture in our Benefits & Science guide.

#If what you really want is energy or confidence

Often, the interest in testosterone is really an interest in feeling stronger, more driven, and more confident. Those goals are worth pursuing directly. Consistent sleep, training, time with people, and keeping small promises to yourself have far better evidence than any abstinence protocol. Our guide to building discipline that lasts is a practical place to start, and does semen retention improve energy? looks at the energy question in detail.

#The bottom line

The headline claim that semen retention boosts testosterone, especially the day-7 peak, rests on a study that has been retracted. A small study suggests testosterone may be somewhat higher after a few weeks of abstinence, but there’s no evidence of large or lasting increases, and no evidence that such changes would transform your energy or confidence. If you’re concerned about your hormones, talk to a doctor. If you practice retention, do it for reasons you value, and build the habits that genuinely support your health. For every other claim, see semen retention benefits: what science actually says and semen retention myths and misconceptions.