Creatine for Men: What It Does, Testosterone, Hair and Libido

Creatine works the same way in men as in women: it fills a muscle energy store so repeated short efforts go a little better and training adds a little more strength. In the largest trial, 45 men on 5 g (grams) a day for 12 weeks showed no change in testosterone, DHT or hair against placebo.¹

What does creatine do for men?

Muscle keeps a small reserve of phosphocreatine to remake energy in the first seconds of a hard effort, and supplementing raises muscle creatine by about 20%.² What creatine does has the full picture. Great Britain's authorised wording is a statement about the ingredient: "Creatine increases physical performance in successive bursts of short-term, high intensity exercise", with the beneficial effect obtained at a daily intake of 3 g (grams), for adults doing high-intensity exercise. Drink as you normally would; the NHS guide is 6 to 8 cups or glasses of fluid a day.³

In 14 short loading trials, mean power across repeated sprints improved.⁴ In 12 trials of adults under 50 who lifted weights, creatine added 1.14 kg of lean mass over training alone.⁵ Every gain came with training; without it the store fills and the early water arrives.

"For men" is a search term, not a biology. No trial sets a dose or a response by sex. The one claimed difference, the starting store, is disputed between two 2021 reviews: one states that women hold 70 to 80% lower creatine stores than men,⁶ the other that women may have higher concentrations per kilogram of muscle.⁷ Creatine for women has the female evidence.

Does creatine raise testosterone or DHT?

No, on the weight of the trials. The largest randomised 45 trained men to 5 g a day or placebo for 12 weeks and found no difference in total testosterone, free testosterone or DHT; testosterone rose in both arms, placebo included.¹ Eleven men loading 20 g a day for five days: no change.⁸ Two smaller trials, of 33 American-football players over ten weeks⁹ and 40 young men over eight weeks,¹⁰ reported a rise in resting testosterone or in the testosterone-to-cortisol ratio. A 2025 review: the majority of studies indicate that creatine has no effect on testosterone levels.¹¹ Two small trials reported a testosterone rise and the largest found none; that is the whole record, and it is not what creatine is for. The register's testosterone wording belongs to zinc: what zinc does for men has it.

DHT has a record of one trial. In 2009, 20 college rugby players loaded 25 g a day for a week, then took 5 g a day for two weeks, against placebo: testosterone did not change, but DHT rose by 56% after the loading week and was still 40% above baseline two weeks later.¹² Sixteen players completed it, the creatine arm started with lower DHT, the placebo arm's fell over the same weeks, and the result has never been repeated.⁷ Oestrogen was not an outcome in any of these trials.

A reader's warning that creatine "can increase testosterone levels and thus make you more short tempered" rests on a rise the trials do not show; creatine is not a steroid and showed no hormonal action in those trials. No study has looked at creatine alongside prescribed testosterone or a DHT-lowering medicine; tell whoever prescribes it.

Does creatine affect libido, erections or fertility?

No human trial has measured sperm, fertility, libido or erections in men taking creatine. The only laboratory work added creatine phosphate to semen in a dish, which is not a man taking a supplement; the 2025 review reporting it concludes only that the evidence does not suggest creatine harms male fertility.¹¹ Lasting longer in bed and erectile problems: not studied either way, and with no hormonal action there is no mechanism to expect an effect.

Erection problems are a GP conversation, not a supplement one. The NHS says erectile dysfunction "is very common, particularly in men over 40" and "usually nothing to worry about, but see a GP if it keeps happening"; frequent problems may be caused by a condition such as high blood pressure, high cholesterol, diabetes, depression or anxiety, or hormone problems.¹³

Does creatine cause hair loss in men?

No study has shown it. The 2009 DHT trial never looked at hair. The 2025 trial did, and found no difference from placebo after 12 weeks at 5 g a day.¹ Beyond 12 weeks nobody has looked, and no trial has recruited men already losing hair. Does creatine cause hair loss holds the full record.

How much creatine should a man take, and when?

The same as anyone: no trial has set a male dose. The register's condition is 3 g (grams) a day, which fills muscle stores in about four weeks; 5 g a day is the convention in most trials.² Dose scales with bodyweight, not sex; the 70 kg worked example is on how much creatine should you take. Timing matters little; with a meal is kinder to the stomach. Keep single servings to 5 g: in 59 footballers, 10 g in one go doubled the rate of diarrhoea compared with 5 g twice a day.¹⁴ Drink as you normally would; the NHS guide is 6 to 8 cups or glasses of fluid a day, more in heat or during long sessions; no water target has been evidenced for creatine.³

Is creatine good for men over 40, 50 and 60?

The older-adult trials are encouraging, and every one involved lifting weights. Across 22 trials of 721 adults with mean ages of 57 to 70 who trained two or three days a week for 7 to 52 weeks, creatine added 1.37 kg of lean tissue and improved chest-press and leg-press strength over placebo.¹⁵ The register's over-55 sentence, for adults in regular resistance training, is quoted with its conditions on the page linked above. A 50-year-old who starts lifting twice a week is in the population those trials studied; a sedentary one is not. Men over 70 have not been studied separately. Collagen for men has that protein's trials.

Side effects men ask about: acne, blood pressure, prostate

Acne: not studied in any creatine trial. Blood pressure: in 112 postmenopausal women over two years it did not differ from placebo; nobody with high blood pressure has been studied, so if you have it, ask first.¹¹ Prostate: no trial has measured any prostate outcome, cancer included, so a man with prostate cancer should ask his oncology team before adding anything. Depression: findings only, on creatine and the brain; never stop or change a prescribed medicine. Kidney blood tests: creatine raises blood creatinine, which kidney tests measure. The NHS says creatine "can affect the results of your kidney function tests" and "If you're using creatine, let your clinic doctor know".¹⁶ Before the test, tell your GP, practice nurse or pharmacist: "I take creatine every day; please bear that in mind when you read my kidney result." Creatine side effects has the rest.

What to check on a label

"Best creatine for men" has a plain answer: the molecule is the same, and the trials above used creatine monohydrate at 3 to 5 g a day in men and women alike. "Men's creatine" is a marketing category, not a formulation. Read the label for: creatine monohydrate on the ingredients line; the creatine per serving in grams, not the weight of the whole serving; the servings per pack; what else is in the serving; and that the finished product is batch-tested. Powder, gummies, tablets and drinks deliver the same molecule; count the servings that reach 3 g.

Frequently asked questions

What are the benefits of creatine for men?

The authorised one: creatine increases physical performance in successive bursts of short-term, high intensity exercise, at 3 g a day. With resistance training, about 1.1 kg more lean mass under 50 and 1.37 kg in older adults.^{5, 15}

Is men's creatine different from women's?

No. The molecule and the trial doses are the same; the marketing differs. See creatine for women and creatine in perimenopause and menopause.

Will creatine help a slim man gain weight?

A little, and mostly water at first: about 0.8 kg of body mass within a week of loading in the sprint trials.⁴ Lean mass beyond that needs training and enough food; creatine is not a mass gainer.

Who should avoid creatine?

Ask first if you have kidney disease, are under 18, are pregnant or breastfeeding, or take regular medicines. Tell your GP you take it before any kidney blood test.¹⁶

Does creatine make you angry?

Nothing in the hormone trials supports it: testosterone did not differ from placebo in the largest.¹ If your mood changes after starting anything new, mention it to your GP.

Sources

1. Lak M, et al. Does creatine cause hair loss? A 12-week randomised controlled trial. J Int Soc Sports Nutr, 2025. PubMed 40265319.
2. Hultman E, et al. Muscle creatine loading in men. J Appl Physiol, 1996. PubMed 8828669.
3. NHS. Water, drinks and hydration; reviewed 17 May 2023, fetched 11 Oct 2026. nhs.uk.
4. Glaister M, Rhodes L. Short-term creatine supplementation and repeated sprint ability: a meta-analysis. Int J Sport Nutr Exerc Metab, 2022. PubMed 36041731.
5. Desai I, et al. Creatine supplementation and body composition with resistance training: a meta-analysis. J Strength Cond Res, 2024. PubMed 39074168.
6. Smith-Ryan AE, et al. Creatine supplementation in women's health. Nutrients, 2021. PubMed 33800439.
7. Antonio J, et al. Common questions and misconceptions about creatine supplementation. J Int Soc Sports Nutr, 2021. PubMed 33557850.
8. Eijnde BO, Hespel P. Short-term creatine supplementation does not alter the hormonal response to resistance training. Med Sci Sports Exerc, 2001. PubMed 11252073.
9. Hoffman J, et al. Creatine and beta-alanine supplementation: performance and endocrine responses in strength/power athletes. Int J Sport Nutr Exerc Metab, 2006. PubMed 17136944.
10. Eghbali E, et al. Creatine hydrochloride or monohydrate alongside resistance training. Physiol Res, 2024. PubMed 39545789.
11. Antonio J, et al. Part II. Common questions and misconceptions about creatine supplementation. J Int Soc Sports Nutr, 2025. PubMed 39720835.
12. van der Merwe J, et al. Three weeks of creatine monohydrate supplementation affects dihydrotestosterone to testosterone ratio in college-aged rugby players. Clin J Sport Med, 2009. PubMed 19741313.
13. NHS. Erectile dysfunction (impotence); reviewed 28 Jul 2023, fetched 11 Oct 2026. nhs.uk.
14. Ostojic SM, Ahmetovic Z. Gastrointestinal distress after creatine supplementation in athletes. Res Sports Med, 2008. PubMed 18373286.
15. Chilibeck PD, et al. Creatine supplementation during resistance training in older adults: a meta-analysis. Open Access J Sports Med, 2017. PubMed 29138605.
16. NHS. Taking PrEP with other medicines and herbal supplements; reviewed 10 Mar 2023, fetched 11 Oct 2026. nhs.uk.

This article is general information, not medical advice. If you have a medical condition or take regular medicines, speak to your GP or pharmacist.