Does Semen Retention Increase Testosterone? The Research, Read Honestly
Written and reviewed by The Kriya Yogi · Updated 22 September 2026
Almost every retention thread eventually cites the same two studies, usually second-hand and usually stripped of their caveats. Both are real. Neither shows what the screenshots claim. This guide reads them properly, then states what is actually known about ejaculation, abstinence and testosterone.
Before you read on
- The famous figure — testosterone around 145% of baseline on day 7 of abstinence — comes from Jiang et al. (2003), a small study of 28 men in Zhejiang, China, measuring a short abstinence window.
- In that study levels fluctuated without a clear trend for the first five days, peaked on day 7, and then declined back toward baseline. It does not show a sustained rise, and the authors did not claim one.
- Exton et al. (2001), the other commonly cited paper, found no significant change in baseline testosterone across three weeks of abstinence in healthy men — though acute orgasm-related hormonal changes were observed.
- Physiologically, testosterone production is governed by the hypothalamic-pituitary-gonadal axis, sleep, body composition, illness, stress, medication and age. Ejaculation is a minor and transient input by comparison.
- Nothing in the literature supports the popular claim of a large, durable increase in baseline testosterone from long-term retention.
- If you suspect genuinely low testosterone, that is a blood test and a clinician. Symptoms of hypogonadism are treatable, and guessing costs years.
The study behind the "day 7" claim
The source is M. Jiang and colleagues, "A research on the relationship between ejaculation and serum testosterone level in men," published in the Journal of Zhejiang University Science in 2003. Twenty-eight volunteers abstained from ejaculation, and serum testosterone was sampled over the following days.
What the paper reports is a fluctuation rather than a climb. Levels moved without clear direction over the first five days. On the seventh day there was a pronounced spike — the figure widely quoted as roughly 145% of baseline — after which levels declined back toward where they started.
Take the limitations seriously. Twenty-eight participants is small. The window was short, so the study says nothing at all about weeks or months. The spike was a single measured day, which in a small sample is exactly the pattern you would expect from normal variability plus the multiple-comparison problem. Testosterone is also diurnally variable in healthy men, dropping substantially from morning to evening, which makes sampling discipline critical to interpretation. And, most importantly: the result concerns a transient peak, not a new baseline.
This is a legitimate small finding that has been inflated into a physiological law. The paper is not the problem. The screenshots are.
The study people cite as the counterweight
Michael Exton and colleagues published work in Psychoneuroendocrinology in 2001 examining hormonal changes around sexual abstinence and activity in healthy men. Across a three-week abstinence period they found no significant change in baseline serum testosterone, while observing acute, transient hormonal responses associated with orgasm.
Set side by side, the two papers are not really in conflict. A short-lived spike around a week, inside a system that returns to its own set point, is compatible with a three-week measurement showing no change in baseline. What neither supports is the claim that retention progressively raises testosterone over months.
What actually moves testosterone
This is worth stating, because it is where the real leverage is and it gets almost no airtime in retention communities.
Testosterone in men is regulated by the hypothalamic-pituitary-gonadal axis, with secretion tied closely to sleep — it rises through sleep and peaks in the early morning. The variables with substantial, demonstrated effects on it include: sleep duration and quality (short sleep measurably lowers daytime testosterone in controlled studies), body composition (adiposity is strongly associated with lower levels), age, acute and chronic illness, overtraining combined with underfeeding, alcohol, opioids and certain other medications, and untreated conditions such as sleep apnoea.
If someone is chasing hormonal change, sleeping seven to nine hours, training with adequate food, and getting a real evaluation for symptoms will do considerably more than a day counter. That is the boring answer, and it is the correct one.
What we think is happening
Offered as opinion. Many people who begin retention do feel different within a week or two — more drive, more restlessness, sometimes a distinct edge. That experience is real. The temptation is to explain it with a hormone graph, because a hormone graph feels like a mechanism.
But there are simpler candidates: reduced habitual stimulation changing how salient ordinary things feel, a genuine increase in unspent time and attention, the mood effect of keeping a hard commitment, and straightforward expectation. None of these requires testosterone to have moved at all. And when the experience later fades — the "flatline" of forum vocabulary — the hormonal story becomes a source of confusion and worry that a behavioural story simply would not produce.
The honest sentence is: retention has not been shown to raise your baseline testosterone, and that does not mean nothing is happening.
In practice
Read the abstracts yourself
Jiang 2003 and Exton 2001 are both findable by title. Ten minutes with the abstracts will immunise you against most of what gets posted about them.
Fix sleep before anything else
Testosterone secretion is tied to sleep and peaks in the early morning. Short sleep measurably lowers daytime levels. This is the largest lever most people are ignoring.
Test rather than theorise
If symptoms suggest low testosterone — persistent fatigue, loss of morning erections, low libido, mood change — ask for a morning serum testosterone test. Interpretation belongs with a clinician.
Train and eat like it matters
Resistance training with adequate calories and protein supports a healthy hormonal picture. Chronic under-eating with heavy training does the opposite.
Keep retention in its own column
Practise it for the reasons that hold up — attention, compulsion, discipline — and stop asking it to do endocrinology.
Safety, stated plainly
- Nothing in this section is medical advice and none of it treats, prevents or cures any condition. Persistent pelvic or testicular pain, blood in semen, erectile changes, low mood, compulsive behaviour or distress about sex are matters for a doctor or a qualified therapist — not for a practice experiment.
- Do not self-treat suspected low testosterone. Testosterone therapy has real effects on fertility and cardiovascular risk and belongs under medical supervision; unregulated products sold for 'boosting' are a poor bet at best.
- Persistent fatigue, low libido, loss of morning erections or mood change deserve a proper evaluation. Framing them as a retention 'flatline' can delay diagnosis of treatable conditions including sleep apnoea, thyroid disease, depression and hypogonadism.
- If retention becomes a source of shame, scorekeeping or anxiety about 'resetting the counter', that is a signal to stop and talk to someone, not to try harder. Compulsion in the other direction is still compulsion.
- Do not use retention as a substitute for treatment of anxiety, depression, ADHD, addiction or a relationship problem. It is not a therapy and there is no evidence that it works as one.
- Forceful practices named in the hatha texts around bindu — vajroli, sahajoli, amaroli — involve urethral and genital techniques that carry a real infection and injury risk. We describe them as textual history and do not give instructions for them.
- Breath retention, strong bandha work and long sitting are not appropriate for everyone. Uncontrolled blood pressure, glaucoma, epilepsy, cardiac conditions, recent abdominal or pelvic surgery and pregnancy all call for medical clearance and a teacher first.
- If you have a partner, unilateral decisions about sex are a relationship issue before they are a practice issue. Talk about it.
What can honestly be verified
Jiang et al. (2003, J Zhejiang Univ Sci) measured serum testosterone in 28 men during abstinence and reported fluctuation with a spike around day 7 followed by decline toward baseline — a small, short-window study showing a transient peak, not a sustained rise. Exton et al. (2001, Psychoneuroendocrinology) found no significant change in baseline testosterone over three weeks of abstinence. No study demonstrates a durable increase in baseline testosterone from long-term retention. Sleep duration, adiposity, age, illness, alcohol, certain medications and sleep apnoea all have well-documented associations with testosterone levels.
Questions people ask
+ Does not ejaculating for 7 days increase testosterone?
+ Does semen retention raise testosterone long term?
+ Does ejaculating lower your testosterone?
+ Why do I feel more energetic and aggressive when abstaining then?
+ Should I get my testosterone tested?
References
- Jiang M, Xin J, Zou Q, Shen JW, 'A research on the relationship between ejaculation and serum testosterone level in men', Journal of Zhejiang University Science, 2003.
- Exton MS et al., 'Endocrine response to masturbation-induced orgasm in healthy men following a 3-week sexual abstinence', Psychoneuroendocrinology / World Journal of Urology, 2001.
- Leproult R, Van Cauter E, 'Effect of 1 Week of Sleep Restriction on Testosterone Levels in Young Healthy Men', JAMA, 2011.
- Endocrine Society clinical practice guideline on testosterone therapy in men with hypogonadism (current edition).
Educational content, not medical advice. Check with a doctor before starting new practices if you have a health condition or are pregnant.