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Does Creatine Cause Hair Loss? What the Science Actually Says
It's the most repeated fear in the gym — and it traces back to a single 2009 study that never actually measured hair. Here's what that study found, what a 2025 trial tested directly, and the honest bottom line.
The short answer: no direct evidence — and a 2025 trial argues against it
Quick answer
There is no direct evidence that creatine causes hair loss. The entire concern traces to one 2009 study of 20 rugby players that found a rise in DHT (a hormone linked to male-pattern baldness) — but that study never measured hair at all, and it has never been replicated. A 2025 12-week randomized controlled trial that did look directly at DHT and hair found no significant difference between creatine and placebo. The honest takeaway: for most people creatine is one of the best-studied, safest supplements, and the hair-loss link remains unproven.
Creatine monohydrate is among the most researched supplements in existence, with a strong safety record for muscle and strength. The hair-loss worry is real as a question, but the evidence behind it is far thinner than its reputation suggests.
Where the fear came from — the 2009 study, in context
Quick answer
In a 2009 study, 20 college-aged rugby players took a creatine loading dose (25g/day for a week, then 5g/day) and showed about a 56% increase in DHT. DHT is associated with male-pattern hair loss — so people assumed creatine would cause balding. But the study never measured hair density, shedding, or follicle changes, the DHT levels reportedly stayed within the normal range, and no study since has replicated even the DHT rise. It's a single, small, short study about a hormone, not about hair.
The leap from “DHT went up in one small study” to “creatine causes baldness” skips several unproven steps. Of the dozen-plus studies examining creatine and androgenic hormones, none have shown a meaningful, repeatable increase — and the one that did never connected it to actual hair outcomes.
What the 2025 trial tested — and the honest caveat
Quick answer
For most people, no. A 2025 12-week randomized controlled trial measured DHT, the DHT-to-testosterone ratio, and hair-growth parameters directly, and found no significant differences between creatine and placebo — the authors called it strong evidence against the hair-loss claim. The one honest caveat: if you're strongly genetically predisposed to male-pattern baldness, it's theoretically possible that any DHT shift could matter — but that link is unproven, and this is general information, not medical advice. If you're concerned about thinning, a dermatologist is the right call.
If hair is genuinely your concern, the higher-leverage moves are the ones with real evidence behind them — see our comparison of rosemary oil vs minoxidil, our overview of men's hair-loss treatments, and hair vitamins worth taking. And if you want creatine context, see creatine vs pre-workout.
The evidence base, cited
The fear originates from a 2009 study of college rugby players reporting a ~56% DHT increase on creatine — which never measured hair and has not been replicated. A 2025 12-week randomized controlled trial measured DHT, DHT:testosterone ratio, and hair-growth parameters directly and found no significant difference vs placebo, described as strong evidence against the hair-loss claim (2025 RCT, PubMed; full text, PMC). Cleveland Clinic similarly notes no direct evidence that creatine causes hair loss (Cleveland Clinic).
Sources: 2025 12-week RCT — PubMed / PMC | Cleveland Clinic.
The bottom line
Does creatine cause hair loss? On the current evidence, no — the fear rests on one small 2009 study that measured a hormone, not hair, and a 2025 randomized trial looking directly at hair found nothing. If you're predisposed to male-pattern baldness and want to be cautious, talk to a dermatologist and focus on treatments that actually have evidence. For most people, creatine remains one of the safest, best-studied supplements available.
This article is general information about supplement research, not medical advice. For personal concerns about hair loss or supplementation, consult a qualified healthcare professional.
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