Creatine and Hair Loss: What the 2009 Study Actually Showed (and What It Didn't)
The DHT-elevation study that scared men off the most evidence-backed supplement in the gym. What the data actually says — and why the concern probably doesn't justify avoiding creatine.
Few hair-loss myths spread faster than "creatine causes baldness." It's repeated on bodybuilding forums, cited by coaches, and has deterred men from the most evidence-backed performance supplement available. Let's look at what the study that started this actually showed — and what the totality of evidence says.
01The 2009 study everyone cites
A 2009 South African RCT had rugby players take creatine for 3 weeks and measured DHT levels. DHT increased by about 56% from baseline. The study did not measure hair loss. It did not follow subjects long enough to see any hair effects. It measured one indirect marker — DHT — in one population over 3 weeks. This is the entire foundation for the "creatine causes hair loss" claim that has become conventional wisdom.
No subsequent study has replicated the DHT elevation finding. Multiple larger studies measuring DHT after creatine supplementation have found no significant change. The 2009 study appears to be an outlier, and no study has ever directly measured actual hair loss as an outcome in creatine users.
02What the broader evidence shows
A 2021 systematic review examining creatine and androgen levels across multiple trials found no consistent evidence that creatine significantly elevates testosterone or DHT. The mechanistic pathway from "creatine → elevated DHT → accelerated hair loss" hasn't been established even in theory, let alone practice.
The reasonable position: there is no direct evidence that creatine causes or accelerates hair loss. There is one outlier study showing DHT elevation that other studies haven't replicated. For men genetically predisposed to AGA who are also on effective hair-loss medication, creatine is almost certainly safe to use. For men who aren't on any treatment and are highly concerned, the theoretical risk is low enough that stopping creatine over it is probably an unnecessary sacrifice.
03If you're still concerned
The most sensible approach: use creatine + stay on finasteride. If DHT is the concern, blocking it at the follicle level with medication addresses the worry at its root, regardless of creatine's ambiguous DHT effects. Finasteride is there precisely for situations where DHT might be elevated for any reason.
If DHT is the concern, block it
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