Does creatine cause hair loss?
Further research is likely to change the conclusion.
How we rated this ▾Hide rating detail ▴
| Domain | Rating | Why |
|---|---|---|
| Risk of bias | Serious | The single relevant trial was small and was not designed to study hair; the remaining sources are narrative rather than systematic. |
| Inconsistency | Not serious | Sources do not conflict. There is simply almost nothing here to be inconsistent about. |
| Indirectness | Very serious | Every source measures hormones or reports absence of complaints. Not one measured hair density, shedding, or diagnosed hair loss. |
| Imprecision | Very serious | The originating trial randomized twenty participants over three weeks, which cannot detect a hair outcome that develops over years. |
| Publication bias | Serious | The relevant secondary sources are authored by researchers with sports-nutrition industry ties, and no registered trial has tested the question directly. |
No published study has measured whether creatine supplementation causes hair loss. The concern traces to a single small trial that found a rise in DHT, a hormone linked to male pattern baldness, but that trial never measured hair. Later reviews report no hair-loss signal, though none looked directly.
3 studies analysed1 human trialLast reviewed
What the evidence shows
- The question has not been tested. That is different from having been tested and answered no.
- One 2009 trial in twenty rugby players is the entire origin of the concern, and it measured hormones, not hair.
- A DHT increase is a plausible mechanism, not a demonstrated outcome.
Why scientists think this
Dihydrotestosterone is the androgen most strongly implicated in male pattern hair loss, acting on genetically susceptible follicles to shorten the growth phase.
If creatine raised DHT persistently, a hair effect in susceptible people would be biologically plausible. Plausibility is not evidence that it happens.
The 2009 hormonal finding has not been consistently reproduced, so even the first link in that chain is unsettled.
Where studies disagree
Good-quality studies do not always agree. Where they conflict, we show the conflict rather than picking the tidier answer.
Whether the absence of reported hair loss is reassuring
One reading
Reviews and position statements treat the absence of hair-loss reports across many trials as evidence that the effect does not occur.
The other
Those trials never measured hair, ran for weeks rather than years, and mostly enrolled young men — so the absence of reports reflects the absence of measurement.
The two positions are answering different questions: whether harm was observed, versus whether harm was looked for.
What we still don’t know
- No study has measured hair density, shedding rate, or diagnosed androgenetic alopecia in people taking creatine.
- The originating trial enrolled twenty young male athletes for three weeks, a population and timescale unsuited to detecting hair changes.
- The hormonal finding itself has not been reliably replicated, so the mechanism's first step is uncertain.
- People genetically susceptible to pattern hair loss are the group of interest, and no study has isolated them.
- Most secondary sources on this question carry sports-nutrition industry ties.
What would change our mind
- A randomized trial measuring hair density or standardized shedding counts over twelve months or longer in adults taking creatine.
- A large prospective cohort tracking diagnosed androgenetic alopecia among long-term creatine users versus non-users.
- Consistent replication of the DHT increase across several independent trials, which would strengthen the mechanistic case enough to warrant a direct trial.
- Any evidence isolating people with a genetic predisposition to pattern baldness, the group in whom an effect would be most likely.
The evidence
Every study that informed this assessment, strongest evidence first — including the ones that disagree with our conclusion.
| Study | Design | What it measured | Finding | Quality |
|---|---|---|---|---|
van der Merwe et al. 2009Three weeks of creatine monohydrate supplementation affects dihydrotestosterone to testosterone ratio in college-aged rugby players Clinical Journal of Sport Medicine
Randomized and placebo-controlled, but twenty participants over three weeks, in a narrow population, measuring a hormone rather than the outcome in question. | Randomized controlled trial | Serum dihydrotestosterone and the DHT-to-testosterone ratioSurrogate outcome | Supports | |
Kreider et al. 2017International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine Journal of the International Society of Sports Nutrition
Position stand from a sports-nutrition body with industry relationships. Absence of a listed adverse effect is weak evidence of absence when nobody has looked. | Guideline | Documented adverse effects of creatine supplementation | Contradicts | Industry ties |
Antonio et al. 2021Common questions and misconceptions about creatine supplementation: what does the scientific evidence really show? Journal of the International Society of Sports Nutrition
Narrative rather than systematic, with no pre-specified search strategy, and authored by researchers with sports-nutrition industry relationships. Context only. | Narrative review | Reported adverse effects across the literature, including androgenic concerns | Contradicts | Industry ties |
How we researched this196 screened → 3 included
Databases searched
PubMed, Europe PMC, OpenAlex — searched · 1990-2026
Search strings
- creatine[MeSH] AND (alopecia[MeSH] OR hair[MeSH])
- creatine AND (dihydrotestosterone OR DHT) AND randomized
- creatine supplementation adverse effects androgenic
Included if
- Human participants
- Reports a hair outcome, or an androgenic hormone outcome proposed as a mechanism for hair loss
Excluded if
- Animal and in-vitro androgen work with no human hair outcome
- Case reports without supplementation detail
- Studies of hair-loss treatments unrelated to creatine
Screening
196 records screened → 21 full texts reviewed → 3 included
Notable exclusions
Online summaries and supplement-industry articles asserting creatine is 'proven safe for hair'
Not primary research and not systematic; they cite the same three sources listed here.
Rodent studies of androgen signalling in hair follicles
Animal androgen work cannot answer a human supplementation question, and rodent hair cycling differs substantially from human pattern hair loss.
No external expert reviewer on this page yet. How we assign review.
How AI was used
AI planned the literature search, screened abstracts against our inclusion criteria, extracted study details into the evidence table, drafted this synthesis from that table, and audited every claim against its cited sources. It did not answer from its own knowledge and did not decide what gets published. A human selected the question, checked the evidence table against the sources, and signed off on the verdict. Full disclosure.
Change history
No changes since first publication.