Few topics in men’s health generate as much online debate — and as much misinformation — as the question of whether masturbation affects testosterone levels. A quick search will surface claims ranging from “every ejaculation drains your masculinity” to “abstinence is the key to peak performance.” The NoFap movement has built an entire community around the belief that avoiding masturbation leads to higher testosterone, better muscle gains, sharper focus, and improved confidence.
But what does the research actually say? As a men’s health clinic, we believe that informed decisions should be based on evidence rather than ideology. This article examines the published science on masturbation and testosterone — including the frequently cited studies, their limitations, and what the findings actually mean for men who are concerned about their hormonal health.
The short answer: masturbation does not meaningfully lower your baseline testosterone levels. But the full picture is worth understanding, because it is more interesting than the headline suggests.
Understanding Testosterone Basics
Before diving into the specific question, it helps to understand how testosterone levels work in general, because this context is essential for interpreting the research.
Testosterone is not a static number. It fluctuates throughout the day, with levels typically peaking in the early morning (between 6 am and 9 am) and declining through the afternoon and evening. It also fluctuates in response to a wide range of factors: sleep quality, stress, exercise, nutrition, illness, alcohol consumption, and yes, sexual activity.
These short-term fluctuations are distinct from your baseline testosterone level, which reflects your underlying hormonal health and is determined primarily by age, genetics, body composition, sleep quality, and the health of your hypothalamic-pituitary-gonadal (HPG) axis. The important question is not whether masturbation causes a temporary blip in testosterone (it can), but whether it changes your baseline — the level that determines how you feel and function day to day.
What the Research Actually Shows
Several studies have examined the relationship between sexual activity, ejaculation, and testosterone levels. The findings are remarkably consistent, even if they are often misrepresented online.
Short-term changes around ejaculation
There is evidence that testosterone levels fluctuate slightly around sexual activity and ejaculation, but the changes are small and transient.
A study by Exton and colleagues (2001), published in World Journal of Urology, measured testosterone levels in men before, during, and after masturbation to orgasm. They found a small, brief increase in testosterone during sexual arousal and around the time of orgasm, which returned to baseline shortly afterwards. Notably, they did not find a significant drop below baseline after ejaculation.
A similar study by Kreuger and colleagues (2003) found comparable results: minor fluctuations in testosterone and other hormones around orgasm, but no clinically significant or lasting changes.
The pattern is consistent: sexual activity causes small, temporary hormonal changes that are part of the normal physiological response to arousal and orgasm. These changes are on a similar scale to the fluctuations caused by eating a meal, having a stressful conversation, or doing a set of squats. They do not alter your baseline testosterone.
The famous 7-day abstinence study (Jiang 2003)
This is the study most commonly cited by proponents of abstinence for testosterone optimisation, and it is worth examining closely because it is so frequently misunderstood.
The study, published by Jiang and colleagues in the Journal of Zhejiang University Science in 2003, measured serum testosterone levels in 28 men during a period of sexual abstinence. The key finding: testosterone levels peaked on the seventh day of abstinence, reaching approximately 145.7% of baseline — a roughly 46% increase.
This finding is real, reproducible, and often cited as evidence that abstinence raises testosterone. However, the study’s other findings are almost never mentioned:
- The peak was temporary. After day seven, testosterone levels returned to baseline and remained there. There was no continued elevation with prolonged abstinence.
- Days two through six showed no significant change. The elevated level was specifically a day-seven phenomenon, not a gradual increase throughout the abstinence period.
- The mechanism is thought to be a brief pituitary response to the absence of ejaculation, not a fundamental change in testosterone production capacity.
What this study actually shows is that there is a short-lived hormonal spike on approximately the seventh day of abstinence, after which levels normalise. It does not show that ongoing abstinence produces sustained elevated testosterone. In fact, it shows the opposite: beyond day seven, abstinence has no further effect on testosterone levels.
Longer-term abstinence studies
Studies examining longer periods of abstinence have not found sustained increases in testosterone. A study by Exton and colleagues (2001) examined men after three weeks of sexual abstinence and found no significant difference in basal testosterone levels compared to their pre-abstinence baseline.
Research on populations that practise long-term abstinence (such as certain religious groups) has similarly failed to demonstrate consistently higher testosterone levels compared to sexually active counterparts.
The evidence consistently points to the same conclusion: short-term abstinence produces a brief, transient spike in testosterone (peaking around day seven), but sustained abstinence does not lead to chronically elevated testosterone levels.
Does frequent ejaculation lower testosterone?
On the flip side, studies examining the effects of frequent ejaculation have not found clinically significant reductions in baseline testosterone.
A study published in Archives of Sexual Behavior (Kraemer et al., 1976) found no significant difference in testosterone levels in men who ejaculated frequently compared to those who did not, once the acute transient changes around the act itself had resolved.
More recently, a 2021 review published in Basic and Clinical Andrology examined the available evidence and concluded that there is no convincing evidence that ejaculation frequency has a meaningful long-term impact on serum testosterone levels.
The Difference Between Acute Changes and Baseline Levels
This distinction is central to understanding the science, and it is where most of the online confusion originates.
Acute hormonal changes are short-term fluctuations that occur in response to a stimulus and resolve quickly. They are part of normal physiology. Your cortisol spikes when you wake up. Your insulin spikes when you eat. Your testosterone fluctuates with sexual arousal and orgasm. These transient changes do not define your underlying hormonal health.
Baseline testosterone levels reflect the sustained output of your testes and the regulation of your HPG axis over time. This is what determines whether you have symptoms of low testosterone — fatigue, low mood, reduced libido, loss of muscle mass, increased body fat. Baseline levels are influenced by age, genetics, body composition, sleep, nutrition, chronic stress, and medical conditions. They are not meaningfully influenced by ejaculation frequency.
When someone claims that “masturbation lowers testosterone,” they are either confusing a transient fluctuation with a baseline change, or they are extrapolating from the Jiang study in a way the data does not support.
Does Sexual Activity Affect Gym Performance?
This is one of the most persistent myths in fitness culture: the idea that abstaining from sex or masturbation before training or competition will improve physical performance through higher testosterone levels.
The evidence does not support this claim.
A comprehensive review by Stefani and colleagues (2016), published in Frontiers in Physiology, examined the available research on sexual activity and athletic performance. Their conclusion: there is no evidence that sexual activity the day before or the day of competition negatively affects physical performance. In fact, some studies suggested that sexual activity the night before competition might slightly improve performance in some individuals, potentially through relaxation and reduced anxiety.
The transient hormonal fluctuations associated with ejaculation are far too small and brief to have any meaningful impact on strength, power output, endurance, or muscle protein synthesis. The testosterone changes from a single heavy set of deadlifts are larger than those from ejaculation.
What can affect gym performance is sleep deprivation. If sexual activity late at night significantly cuts into your sleep, the resulting sleep deficit could impair recovery and performance. But this is a sleep issue, not a testosterone issue.
The NoFap Movement: Claims vs Science
The NoFap movement, which originated on Reddit in 2011, advocates for abstaining from pornography and masturbation. It has grown into a significant online community, with members reporting benefits ranging from increased energy and confidence to improved cognitive function, better social skills, and enhanced physical performance. Some of these claims are attributed to the testosterone-boosting effects of abstinence.
It is important to approach this topic with both scientific rigour and genuine empathy, because the experiences of NoFap participants are real — even if the hormonal explanation they attribute to those experiences is not well-supported by evidence.
What NoFap gets right
- Problematic pornography use is a real issue. Some men develop patterns of pornography consumption that interfere with their relationships, sexual function, work, or mental health. For these individuals, reducing or eliminating pornography use can be genuinely beneficial. This is a behavioural issue, not a hormonal one.
- Compulsive sexual behaviour deserves attention. For men who feel their masturbation habits have become compulsive or out of control, addressing this through behavioural change, therapy, or structured programmes can improve their sense of self-control and wellbeing.
- Placebo and behavioural effects are powerful. When someone makes a deliberate decision to change a habit, commits to it publicly within a community, and experiences a sense of agency and discipline, the psychological benefits are real. Feeling more disciplined and in control can genuinely improve confidence, motivation, and social interaction — regardless of any hormonal mechanism.
What NoFap gets wrong
- The testosterone explanation is not supported. As we have discussed, the evidence does not support the claim that abstinence produces sustained testosterone elevation. The day-seven spike from the Jiang study is real but temporary, and it does not translate into the weeks or months of “supercharged testosterone” that some advocates describe.
- “Semen retention” as an energy source is not a scientific concept. The notion that retaining semen preserves vital energy or nutrients has roots in ancient tradition rather than modern physiology. Semen production is a continuous process, and the nutritional content of ejaculate (primarily fructose, small amounts of protein, zinc, and other minerals) is nutritionally negligible.
- Universal advice to abstain is not evidence-based. For the majority of men, masturbation at a reasonable frequency is a normal, healthy part of sexual function. Framing it as inherently harmful can create unnecessary guilt and anxiety, which ironically can impair sexual function and psychological wellbeing.
A balanced perspective
If you feel that your pornography use or masturbation habits are problematic — if they are interfering with your relationships, your work, your mental health, or your ability to enjoy sexual intimacy with a partner — then addressing those habits is absolutely worthwhile. But the benefits you experience from that change are likely to be psychological and behavioural, not hormonal.
If you are concerned about your actual testosterone levels, the answer is not abstinence — it is a blood test.
What Actually Affects Baseline Testosterone
If masturbation is not meaningfully affecting your testosterone, what is? Understanding the factors that genuinely influence your baseline testosterone levels is far more useful than worrying about ejaculation frequency.
Sleep
Sleep is arguably the single most important modifiable factor for testosterone production. The majority of daily testosterone release occurs during sleep, particularly during REM stages. Studies have shown that restricting sleep to five hours per night for just one week can reduce testosterone levels by 10–15%. The NHS recommends seven to nine hours per night for adults.
Body composition
Excess body fat, particularly visceral abdominal fat, actively suppresses testosterone through increased aromatase activity (converting testosterone to oestrogen) and inflammation. Losing body fat is one of the most effective ways to improve testosterone levels naturally.
Exercise
Regular resistance training (weight lifting, bodyweight exercises) has been consistently shown to support healthy testosterone levels. High-intensity interval training (HIIT) also has acute testosterone-boosting effects. Conversely, excessive endurance training without adequate recovery can suppress testosterone.
Nutrition
Adequate caloric intake (avoid severe caloric restriction), sufficient dietary fat (cholesterol is the precursor to testosterone), zinc, magnesium, vitamin D, and overall micronutrient adequacy all support testosterone production. Crash diets and very low-fat diets are both associated with reduced testosterone.
Stress
Chronic psychological stress elevates cortisol, which directly suppresses GnRH and LH secretion, reducing testosterone production. Stress management is a legitimate testosterone-supporting strategy.
Alcohol
Heavy alcohol consumption is directly toxic to the Leydig cells and suppresses the HPG axis. Moderate consumption has less impact, but regular heavy drinking is a significant contributor to low testosterone.
Age
Testosterone levels naturally decline with age, typically by approximately 1–2% per year after the age of 30. This is a normal physiological process, though the rate of decline varies considerably between individuals and is influenced by all of the factors listed above.
Medical conditions
Conditions including obesity, type 2 diabetes, metabolic syndrome, obstructive sleep apnoea, chronic opioid use, and certain pituitary disorders can significantly suppress testosterone production. Some medications, including opioids, corticosteroids, and certain antidepressants, can also lower testosterone.
When to Get Your Testosterone Tested
If you are genuinely concerned about your testosterone levels — whether or not that concern was initially triggered by worries about masturbation — the most productive step is to get tested. Symptoms of low testosterone include:
- Persistent fatigue that does not improve with rest
- Low mood, irritability, or depression
- Reduced sex drive
- Difficulty achieving or maintaining erections
- Loss of muscle mass or strength
- Increased body fat, particularly around the abdomen
- Poor concentration or “brain fog”
- Reduced motivation or sense of drive
- Loss of morning erections
If you are experiencing several of these symptoms, they deserve investigation regardless of your masturbation habits. A comprehensive testosterone blood test can objectively determine whether your levels are within the healthy range or whether hormonal factors may be contributing to how you feel.
Our free online testosterone assessment is a quick way to evaluate whether your symptoms are consistent with low testosterone and whether further investigation is warranted.
The Bottom Line
The evidence is clear: masturbation does not lower your baseline testosterone levels in any clinically meaningful way. Ejaculation causes small, transient hormonal fluctuations that are a normal part of physiology and resolve quickly. Short-term abstinence produces a brief spike in testosterone around day seven, but this does not persist with continued abstinence.
There is no evidence that ejaculation frequency affects gym performance, muscle growth, or athletic output. The testosterone changes from ejaculation are too small and too brief to have any such impact.
The NoFap movement may offer genuine benefits for men struggling with problematic pornography use or compulsive sexual behaviour, but these benefits are psychological and behavioural, not hormonal. Framing normal sexual activity as harmful is not supported by the science.
If you are concerned about your testosterone levels, focus on the factors that genuinely matter: sleep quality, body composition, exercise, nutrition, stress management, and alcohol intake. And if symptoms persist despite healthy lifestyle practices, get a blood test. That is the evidence-based approach to understanding and optimising your hormonal health.
At Evernu, we provide thorough hormonal assessments and evidence-based treatment for men across the UK. If you are experiencing symptoms of low testosterone, we are here to help you understand what is going on and what your options are — based on science, not myths.
Frequently Asked Questions
Will abstaining from masturbation for 7 days boost my testosterone?
The Jiang (2003) study found a temporary testosterone peak on approximately the seventh day of abstinence, reaching about 146% of baseline. However, this spike was transient — levels returned to baseline afterwards and did not remain elevated with continued abstinence. It is a brief physiological blip, not a sustained hormonal advantage.
Does masturbation affect muscle growth?
No. The transient hormonal changes from ejaculation are far too small and brief to affect muscle protein synthesis or recovery. Your training programme, protein intake, sleep quality, and overall caloric intake are the factors that drive muscle growth. Masturbation frequency is not a relevant variable.
Can excessive masturbation cause low testosterone?
There is no evidence that masturbation frequency, even if frequent, causes clinically low testosterone levels. If you have symptoms of low testosterone, they are almost certainly caused by other factors (age, body composition, sleep, stress, medical conditions) rather than by ejaculation frequency. A blood test is the only way to know for certain.
Is there any benefit to “semen retention”?
From a hormonal perspective, the evidence does not support sustained benefits from semen retention. The psychological benefits some men report (increased discipline, reduced compulsive behaviour, improved self-esteem) are real but are likely related to the behavioural and psychological aspects of the practice rather than any hormonal mechanism.
Should I abstain before a blood test for testosterone?
There is no clinical recommendation to abstain from sexual activity before a testosterone blood test. The standard guidance is to have the blood drawn in the morning (before 10 am), as testosterone levels are highest in the early morning. Fasting may be recommended depending on the other markers being tested. Ejaculation the evening before is unlikely to meaningfully affect your morning testosterone reading.
This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before starting or changing any medication. Evernu is regulated by the Regulation and Quality Improvement Authority (RQIA).
