Current scientific evidence does not establish that creatine monohydrate causes hair loss. The concern traces entirely to a single 2009 study involving college-aged rugby players that found creatine supplementation raised levels of dihydrotestosterone (DHT), a hormone associated with male-pattern baldness. That study did not measure hair loss, only a hormonal marker. No subsequent controlled study has replicated the finding or confirmed a causal link between creatine supplementation and hair thinning or loss in humans.
The fear has spread through gym communities and fitness forums far beyond what the underlying research actually supports. That does not mean it is baseless speculation worth dismissing in two sentences. The DHT pathway is a real biological mechanism, and the 2009 finding is a legitimate data point. What it means is that one study measuring a hormone proxy is a hypothesis, not a verdict. Here is what the evidence actually shows, and where the genuine uncertainty sits.
Where the creatine-hair-loss claim comes from
The claim originates almost entirely from a single published study. In 2009, researchers at a South African university recruited college-aged male rugby players for a three-week creatine supplementation trial. Participants took a loading dose followed by a maintenance phase. At the end of the study, the researchers measured blood levels of various androgens and found that DHT levels had increased meaningfully, and that the ratio of DHT to total testosterone also rose.
The study was published in a peer-reviewed sports medicine journal, which gave it credibility. The concern is mechanistically coherent: 5-alpha reductase, an enzyme present in scalp tissue, converts testosterone into DHT. DHT binds to receptors in genetically susceptible hair follicles, progressively miniaturizing them in a process that leads to androgenetic alopecia, the clinical name for male-pattern baldness. If creatine genuinely raises DHT, and your follicles carry the relevant genetic sensitivity, the theoretical chain from creatine to hair thinning is not absurd.
The problem is that the researchers never measured hair. They measured a biomarker. Elevated DHT does not guarantee hair loss; it raises the risk in people who are already genetically predisposed. Someone with no family history of androgenetic alopecia is unlikely to experience hair loss from a transient DHT elevation even if the hormonal finding is real. The study measured a possible contributing factor in a predisposed subset, not an outcome across a population.
What the 2009 study actually measured, and what it did not
This distinction matters more than it might initially appear. The rugby player study is frequently cited as evidence that “creatine causes hair loss.” That is not what it showed. It showed that creatine supplementation was associated with a rise in DHT levels in a small group of young male athletes over three weeks.
Several important caveats apply. The sample was small, which limits statistical reliability. The population was young, male, athletic, and likely already operating with elevated androgen activity compared to a general population. The study was not designed to measure, and did not measure, any change in hair density, hair follicle diameter, or alopecia progression. The DHT measurement was a secondary endpoint in a trial primarily focused on performance and body composition.
A genuine test of whether creatine causes hair loss would require a design that actually measures hair outcomes across a meaningful timeframe, in a population tracked long enough for androgenetic effects to manifest. No such study exists.
The DHT elevation finding has also not been consistently replicated. Several subsequent studies examining creatine’s hormonal effects found no significant change in DHT or testosterone levels. The 2009 finding may reflect a real but context-specific effect in high-load athletic conditions, a statistical artifact of a small sample, or some combination of both.
| Evidence | What it measured | Finding |
|---|---|---|
| 2009 rugby-player study | DHT and testosterone over 3 weeks | DHT rose; no hair outcome measured at all |
| Subsequent androgen trials | Testosterone and DHT in creatine users | Most found no significant change in DHT |
| 2025 randomized controlled trial | Hair density, DHT, and follicle count over 12 weeks | No significant changes |
The first trial to directly measure hair outcomes rather than a hormone proxy arrived in 2025, and it found no significant change in hair density, DHT, or follicle count over twelve weeks of supplementation.
What larger reviews of creatine safety actually conclude
Creatine is among the most extensively studied performance supplements in existence. The research base extends across decades, with hundreds of trials examining its effects on muscle, performance, cognition, and safety. International sports medicine organizations, including bodies that have published comprehensive position statements on creatine supplementation, have not listed hair loss as an established side effect.
Reviews of creatine’s broader safety profile consistently flag the same categories of concern: gastrointestinal discomfort at high doses, the theoretical possibility of kidney stress in individuals with pre-existing renal conditions, and modest water retention in muscle tissue. Hair loss does not appear in these consensus statements as a confirmed adverse effect. That absence reflects the literature’s state: no controlled trial has demonstrated hair loss as a reproducible outcome of creatine use.
For context on how single studies can distort health narratives more broadly, the health reporting at Great Lakes Ledger regularly covers the gap between individual study findings and the actual state of scientific consensus.
What we genuinely do not know
Intellectual honesty requires flagging the limits of the current evidence in both directions. The absence of a proven link is not the same as proof of absence, and that distinction is worth being clear about.
No long-term study has tracked hair follicle health in creatine users over years. The research on creatine and androgens is not voluminous enough to rule out a meaningful DHT effect with certainty. Most creatine studies are short-term, typically weeks to months, and focused on performance outcomes rather than dermatological ones. Hair loss from androgenetic alopecia is a slow process; three-week trials are not designed to detect it even if it were occurring.
If you are a male with a strong family history of male-pattern baldness and you already notice early-stage thinning, the precautionary logic of wanting to avoid anything that might raise DHT is not irrational. You cannot be told with certainty that creatine supplementation will have no effect on your hair. What you can be told is that the direct evidence for that effect is thin, that the one study suggesting a DHT mechanism has not been reliably replicated, and that the broader safety literature on creatine does not treat hair loss as an established concern.
That is the honest position. One study, a plausible mechanism, no confirmed outcome, and a replication failure. Act on it according to your own risk tolerance and family history.
A citable block for the record
The claim that creatine causes hair loss rests primarily on a 2009 study in male rugby players that found creatine supplementation raised DHT (dihydrotestosterone) levels, a hormone linked to androgenetic alopecia. That study measured a hormonal proxy, not hair: it did not track hair density, follicle count, or balding, used a small sample, and ran only three weeks. Its DHT finding has not been consistently replicated, and most subsequent trials measuring creatine’s effect on androgens found no significant change. A 2025 randomized controlled trial that directly measured hair density, DHT, and follicle count over twelve weeks found no significant changes. Major sports-nutrition position stands do not list hair loss as an established adverse effect of creatine. For people genetically predisposed to male-pattern baldness the DHT mechanism is a reasonable theoretical concern, but direct clinical evidence of creatine-induced hair loss in humans does not currently exist.
Practical takeaway if you use creatine or are considering it
Creatine monohydrate remains one of the most evidence-supported performance supplements available, with a consistent record of improving high-intensity exercise output and supporting muscle protein synthesis. The hair loss concern, while not impossible to dismiss entirely, does not have the evidentiary weight to recommend that most people avoid it on those grounds.
If you have a family history of early-onset male-pattern baldness and are already seeing signs of thinning, a conversation with a dermatologist about your androgen levels and hair follicle health makes more sense than relying on forum consensus either way. A dermatologist can assess your actual DHT levels and follicle status, which is more actionable than population-level statistics in either direction.
If you are not in that risk category, the current evidence does not justify avoiding creatine for hair-related reasons. Monitor how your body responds, as with any supplement, and revisit if you notice changes. That is not a dismissal of the concern; it is an accurate read of what the research currently supports.
For anyone exploring the broader picture of how supplements interact with hormonal health and long-term wellness, the health section of Great Lakes Ledger covers the nuances of nutrition science, chronic disease prevention, and evidence quality with the same standards applied here.
Frequently asked questions
Does creatine raise DHT levels?
One 2009 study in male rugby players found that creatine supplementation was associated with elevated DHT and an increased DHT-to-testosterone ratio. The finding has not been consistently reproduced in subsequent research. Several studies examining creatine’s hormonal effects have found no significant change in DHT. The current evidence is inconclusive, not definitive in either direction.
Can creatine make hair loss worse if I am already losing hair?
There is no clinical trial evidence confirming that creatine accelerates androgenetic alopecia in men who are already experiencing it. If you have a confirmed DHT-sensitive hair loss pattern and are concerned about any factor that could raise androgens, discussing creatine use with a dermatologist or physician is the appropriate step, not relying on generalized supplement advice.
What was the 2009 creatine and DHT study?
The study recruited male college rugby players and tested the effects of a creatine loading and maintenance protocol on androgen levels. At the conclusion of the trial, DHT levels had increased relative to baseline, and the DHT-to-testosterone ratio rose. The researchers did not measure hair loss, hair follicle size, or any dermatological outcome. It remains the primary source for the creatine-hair-loss claim in popular health content.
Is creatine safe for long-term use?
The available long-term safety data on creatine monohydrate is generally reassuring for healthy adults without pre-existing kidney conditions. International sports nutrition bodies have reviewed the evidence base and do not classify it as unsafe for long-term use at standard doses. Hair loss is not listed as a confirmed adverse effect in consensus safety reviews, though the long-term dermatological effects have not been a primary focus of research.
Do women need to worry about creatine and hair loss?
Androgenetic alopecia in women follows different hormonal pathways and is less directly linked to DHT than the male pattern. The 2009 study was conducted entirely in men. Whether creatine supplementation affects androgen levels or hair health in women has not been adequately studied, and extrapolating the male rugby findings to women is not scientifically warranted.
This article is general science and health information only, not medical advice or a substitute for consultation with a qualified healthcare provider. If you have concerns about hair loss, hormonal health, or supplement safety, speak with a licensed physician or dermatologist.
