Does Creatine Cause Hair Loss?

No study has ever found that creatine causes hair loss, and the one trial that looked directly at hair follicles — density, follicle count, thickness, across 12 weeks — found no difference from placebo.² The whole scare traces back to a single 2009 study of college rugby players that measured a hormone in blood.¹ Twenty men volunteered. Sixteen finished. Nobody counted a hair. We sell nothing on this page, which is why the arithmetic below includes the parts that cut against us.

The short answer

There is no evidence that creatine causes hair loss. A 2025 randomized controlled trial gave 45 resistance-trained men 5 g/day of creatine monohydrate or maltodextrin for 12 weeks and assessed their scalps with a trichogram and FotoFinder imaging; hair density, follicular unit count and cumulative hair thickness showed no significant effect of group, time, or group by time.² The 2009 study that started the panic measured hormones in blood and never assessed hair at all.¹ What remains genuinely unsettled is narrow and worth naming: twelve weeks in 38 men is not a multi-year answer, and nobody has tested men with a family history of baldness specifically.

The one study this all comes from

Every version of this claim — every forum thread, every clinic blog, every "creatine gave me a receding hairline" video — leads back to one paper. Here it is in full, in one place.

In 2009, van der Merwe, Brooks and Myburgh ran a double-blind, placebo-controlled crossover trial with a six-week washout at a rugby institute in South Africa, during the competitive season — so "group" here means "condition," and the same men did both arms.¹ Participants took 25 g/day of creatine plus 25 g/day of glucose for seven days, then 5 g/day of creatine plus 25 g/day of glucose for 14 days; the placebo condition was 50 g/day of glucose, then 30 g/day.¹

The results: serum testosterone did not change. Serum DHT rose 56% after the seven-day loading phase and remained 40% above baseline after the 14-day maintenance phase (P < 0.001), and the DHT-to-testosterone ratio rose 36%, then sat 22% above baseline (P < 0.01).¹ Twenty men volunteered¹ and 16 completed the study.³ Free testosterone — the fraction that actually feeds DHT production — was never measured.³

The authors' own conclusion was explicitly hypothesis-generating: creatine "may, in part, act through an increased rate of conversion" of testosterone to DHT, and "further investigation is warranted."¹

What it never measured

Hair. Not a count, not a density, not a photograph, not a follicle.

The paper's Main Outcome Measures were serum testosterone, serum DHT, the DHT-to-testosterone ratio, and body composition.¹ That is a stronger statement than any verdict about the result, because it means the connection between this study and your hairline was never in the study. It was assembled afterwards by readers who knew DHT is linked to male-pattern baldness and filled in the rest.

The arithmetic nobody prints

Consumer pages quote the 56% and stop. The ISSN's 2021 review went back to the underlying numbers and published the absolute values, and they change how the figure reads.³

• Baseline DHT was 23% lower in the creatine condition (0.98 nmol/L) than in the placebo condition (1.26 nmol/L) — before anyone took anything.³
• The creatine condition rose +0.55 nmol/L at seven days and +0.40 nmol/L at 21 days.³
• The placebo condition fell −0.17 nmol/L at seven days and −0.20 nmol/L at 21 days.³

Do the addition yourself: 0.98 + 0.55 = 1.53 nmol/L. After the famous 56% surge, DHT in the creatine condition sat at 1.53 nmol/L — against a comparison condition that started at 1.26 while supplementing with nothing but glucose. A 56% rise from an unusually low starting point, measured against an arm drifting downward, is what produced the statistically significant result, and the ISSN reviewers say so directly.³ They also note that DHT and the DHT:T ratio stayed well within normal clinical limits throughout.³

One more detail that rarely survives the retelling: the loading dose was 25 g/day, five times what most people take, and only for a week. If you want a normal creatine dose, it is 3–5 g/day, and this protocol is not it.

Fifteen years, no replication

The 2021 ISSN review states plainly that these results "have not been replicated," and points out that intense resistance exercise itself raises these androgenic hormones — in men who were mid-season at a rugby institute.³ The paper also drew a published letter to the editor with an author reply in the same journal.⁶ We are noting only that the exchange exists; the full text sits behind a publisher wall we have not read, so we are not going to characterise what it argued.

What DHT actually does to hair (and what it doesn't)

This is the step everybody skips, and it is where most of the confusion lives.

DHT is formed from testosterone by the enzyme 5-alpha-reductase. In androgenetic alopecia — male- or female-pattern hair loss — DHT binds androgen receptors in susceptible scalp follicles and causes them to shrink, so the growth phase shortens and hairs come back progressively shorter and finer.³⁵ That part is well established.

Here is the nuance that changes the argument. Pattern hair loss is primarily a story about receptor sensitivity, not circulating hormone level. MedlinePlus Genetics describes variations in the AR gene that "result in androgen receptors that are more easily stimulated by androgens than normal, leading to increased activity of the receptors in hair follicles."⁵ Men with pattern hair loss are not characterised by abnormal blood androgens; they are characterised by follicles that respond strongly to ordinary ones. Two men with identical serum DHT can have completely different hairlines at 45.

There is also a compartment problem. Serum DHT and scalp-skin DHT are different things, measured separately. A 1999 study biopsied the scalps of 249 men with androgenetic alopecia before and after 42 days and reported both: on 1 mg of finasteride, scalp skin DHT fell 64.1% and serum DHT fell 71.4% (P < .001).⁴

This next part is mechanistic reasoning, not trial data, and we would rather label it than smooth it over. That study is here to establish two things only: that the two compartments are distinct and separately measurable, and that the intervention with the best-documented follicle-level effect works by driving DHT down by roughly two thirds over weeks. It is a calibration for your intuition about scale — nothing more. It is not a conversion factor. Nobody has ever measured DHT in scalp tissue on creatine, so there is no honest way to translate a percentage change in blood into anything at a follicle. Anyone doing that arithmetic for you is making it up. And finasteride is a prescription drug: it appears in this section as a measuring instrument, not as a suggestion, and any question about it belongs with a clinician.

What happened when someone finally measured hair

In 2025, Lak and colleagues ran the study that should have been run in 2010. Forty-five resistance-trained men aged 18–40 were randomized to 5 g/day of creatine monohydrate or 5 g/day of maltodextrin for 12 weeks with no loading phase; 38 completed.²

On hormones: no group-by-time interaction for DHT, total testosterone, free testosterone, or the DHT:T ratio.² On hair, assessed by trichogram and FotoFinder: no significant effect of group, time, or group by time on hair density, follicular unit count, or cumulative hair thickness.²

The hormone data carries a lesson worth stealing. Total testosterone rose in both arms over the 12 weeks — creatine +124 ± 149 ng/dL, placebo +216 ± 203 ng/dL — and free testosterone fell in both, independent of what anyone was supplementing.² Run that trial without a placebo arm and you have a headline in either direction. The full hormone record is in our creatine and testosterone guide.

Who funded the study that clears creatine

This is the trial we lean on hardest, so you should know who was on it. Its published conflict-of-interest statement discloses that one author is CEO and co-founder of the International Society of Sports Nutrition and a scientific advisor to Creapure, Bear Balanced, Create and ENHANCED Games; another is an ISSN sport-nutrition advisor who has received creatine donations from Creapure for research; a third owns a consultancy serving supplement manufacturers.² The largest pooled creatine safety analysis carries similar disclosures, including an author who chairs the scientific advisory board of a company that manufactures creatine monohydrate.⁸

That is a real conflict and we are not going to pretend otherwise. Here is why it does not overturn the result. The trial was randomized and placebo-controlled, the hair outcomes were measured with instruments — a trichogram and FotoFinder imaging — rather than judged by eye, the trial was run under the supervision of the Iran Skin Research Center,² and a null result is the hard one to manufacture — fabricating "no difference" requires suppressing a difference that the instruments would have to have found. The honest position is that the finding is real and the incentives are visible, and you should weight it accordingly rather than either dismissing it or treating it as final.

What it still doesn't settle

The authors list their own limits, and they matter: males only, 12 weeks rather than years, and plasma rather than scalp tissue — so local androgen activity at the follicle was not ruled out.² Family history of hair loss was not recorded, so the genetically predisposed subgroup was never analysed separately.² Ours to add: 38 men is a small trial, the same criticism we made of the 2009 one, and it applies in both directions.

"I started creatine and my hair is shedding"

This is the version of the question people actually arrive with, and the commercial pages on this topic handle it worst, because the ordinary explanation doesn't sell anything.

Telogen effluvium is diffuse shedding that follows a causative event by roughly three months. Acute telogen effluvium lasts less than six months by definition and is described as a benign and spontaneously reversible condition with no associated complications.⁷ Its documented triggers include crash dieting, low protein intake, acute febrile illness, major surgery, severe trauma, hypothyroidism and iron deficiency.⁷

Now look at that three-month lag against how creatine actually enters a life. Almost nobody starts creatine alone. It arrives with a new training program, a cut, a diet overhaul, a job change, a stretch of bad sleep — often several at once. Those things are on the trigger list. Creatine is not. If your shedding began about a season after everything else in your routine changed, the timeline points at the change, not at the powder. It's the same attribution error that makes people blame the water weight on creatine when a new bulk started the same week.

We are describing a pattern, not diagnosing you, and there is a hard line here: persistent, patchy or accelerating hair loss is a dermatologist's assessment, not a supplement decision. Working out whether iron, thyroid or anything else is involved is a clinician's call. This page is educational information, not medical advice.

Should you take creatine if baldness runs in your family?

This is the highest-stakes version of the question, and the one where having nothing to sell is worth something.

Straight answer: the only trial that looked at hair did not exclude anyone for family history, but it also never recorded it, so the predisposed subgroup has never been studied separately.² That residual unknown is real. It is also small — it sits on top of an evidence base where no study has reported hair loss or baldness in humans from creatine at all.³

The other thing worth knowing is how bad individual attribution is here. More than 50% of men over age 50 have some degree of pattern hair loss⁵ — creatine or no creatine, gym or no gym. If you start creatine at 28 and notice thinning at 31, you cannot tell from your own experience whether the powder had anything to do with it, and neither can we, and neither can anyone charging you for a consultation about it.

So this is a judgement call, not a fact we can hand you. What we'd say plainly: the evidence available points to no effect on hair, and if you find creatine useful, the case for stopping is weak. But if the worry itself would nag at you every time you looked in a mirror, not taking creatine costs you very little — it is a modest performance aid, not a necessity. And if you are already under care for hair loss, that conversation belongs with the clinician managing it, not with a supplement page.

What creatine actually does

Creatine's mechanism has nothing androgenic in it. Muscle stores it as phosphocreatine, which donates a phosphate to regenerate ATP during short, hard efforts — so you get a few more quality reps before the tank empties, and those accumulated reps drive the adaptation.³ That's the whole story: an energy buffer, not a hormone.

The full picture of what it does and doesn't do is on our creatine hub, and where it sits next to training and protein is covered in supplements for muscle growth. If your question is really about hormones rather than hair, creatine and testosterone works through the whole trial record.

Frequently asked questions

Is there any study showing creatine causes hair loss?

No. Not one. The 2009 study behind the scare measured serum hormones in 20 rugby players, of whom 16 completed, and never counted a hair — hair was not among its outcome measures. The 2025 randomized trial that did measure hair, using a trichogram and FotoFinder imaging for density, follicle count and thickness, found no difference from placebo over 12 weeks.

Does creatine increase DHT enough to matter for hair?

There is no evidence that it does. One 2009 crossover trial found serum DHT rose 56% during a loading week and stayed 40% above baseline through maintenance, but it started from an unusually low baseline of 0.98 nmol/L and finished at 1.53 — barely above the 1.26 nmol/L where the placebo condition began untreated. It has never been replicated, and the 2025 trial designed to check it found no effect on DHT. Nobody has measured DHT in scalp tissue on creatine at all.

Is hair loss from creatine reversible?

There is no established hair loss from creatine to reverse. If you are shedding, the far more common explanation is telogen effluvium, which typically follows its trigger by about three months, lasts under six months, and resolves on its own. Persistent or patchy shedding is worth a dermatologist's assessment rather than a guess about a supplement.

Should I take creatine if male-pattern baldness runs in my family?

Nobody has tested that group specifically — the 2025 trial didn't record family history, so the predisposed subgroup has never been analysed on its own. The evidence we have shows no effect on hair, but that's a 12-week answer in 38 men. If the worry would bother you more than the benefit is worth, skipping creatine costs you very little.

How long after starting creatine would hair loss show up?

There's no established timeline, because there's no established effect. Shedding that starts two to three months after any major change — a new program, a cut, an illness, a stressful stretch — fits the ordinary telogen effluvium pattern rather than anything specific to creatine.

Does creatine affect testosterone?

No. Trials measuring total and free testosterone have not found a meaningful change from creatine, and in the 2025 trial testosterone rose more in the placebo group than in the creatine group. The full trial record is in our creatine and testosterone guide.

The bottom line

The creatine–hair-loss story is one small crossover trial in 20 volunteers, 16 of whom finished, that measured a hormone in blood and never looked at a hair — with a headline 56% that came off an unusually low baseline against a comparison arm drifting down.¹³ Fifteen years later, the first study to examine hair follicles directly found nothing over 12 weeks in 38 men.² That is not proof of a negative and we won't dress it up as one: the predisposed subgroup has never been studied, and nobody has measured scalp-tissue DHT on creatine. But "no evidence has ever shown it, and the one direct look found nothing" is a very different position from the one page one of Google implies. If your question is broader than hair, creatine side effects covers the rest, and the creatine hub has the full evidence picture.