Almost every hair loss forum has the same thread: a guy notices his hairline, remembers he started creatine eight months ago, and asks whether the tub in his kitchen is the reason.

The fear is not invented out of nothing. It traces back to one specific study, published in 2009, on twenty rugby players. That study has been cited in thousands of blog posts, video scripts and product reviews as proof that creatine wrecks your hair. It is worth reading what it actually said, because the gap between what it measured and what people claim it showed is enormous. And as of 2025, there is finally a trial that looked directly at the thing everybody cares about: the hair itself.

The 2009 study everyone cites

That is a real finding from a reasonably well-designed small trial, and it is not nothing. DHT is the androgen that drives follicle miniaturisation in pattern hair loss. If a supplement reliably raises it, that is worth knowing about.

But notice what the study measured: hormones in blood, over three weeks, in twenty men.

What that study never measured

The 2009 trial did not measure hair.

Not hair count. Not hair density. Not follicle diameter. Not miniaturisation. Not shedding. Not a single participant’s scalp was assessed at any point. The phrase “hair loss” appears in the discussion as speculation about what elevated DHT might theoretically mean, not as an outcome anyone collected data on.

That is the entire foundation of the creatine-and-hair-loss belief: a three-week hormone study that never looked at a head.

There are two other things worth holding in mind. The sample was twenty athletes, which is small enough that a few unusual responders can move a group average considerably. And the finding has not been cleanly replicated in the years since. Other trials that measured androgen responses to creatine, such as Op ‘t Eijnde and Hespel’s 2001 crossover study in Medicine and Science in Sports and Exercise, found no meaningful change in the testosterone response to resistance training with short-term supplementation. The 2009 result has stood largely alone.

Why serum DHT is not the same as scalp DHT

Even taking the 56% figure at face value, there is a step in the logic that usually gets skipped.

Pattern hair loss is driven by DHT produced locally, inside the scalp, by type II 5-alpha reductase acting on testosterone in the follicle and surrounding tissue. Scalp DHT concentrations are not a simple read-out of what is floating in your bloodstream, and serum DHT is a famously poor predictor of who goes bald and how fast. Plenty of men with high-normal serum DHT keep their hair into their sixties. Plenty of men with unremarkable levels are Norwood 5 by thirty. The dominant variable is androgen receptor sensitivity in the follicles you inherited, not the number on a blood panel.

This is why the 2009 study, on its own, could never have answered the question. A change in serum DHT is at best an indirect hint. What people actually want to know is whether hair falls out, and only a study that counts hair can tell you that.

The 2025 trial that finally looked at hair

This is the first study to put a dermatoscope on the scalps of people taking creatine and compare them against placebo. Over twelve weeks at a standard 5 g maintenance dose, it found nothing: no androgen shift, no measurable change in hair.

It is also worth noting that total testosterone drifted up in both groups over the study period and free testosterone drifted down in both groups. Those changes happened regardless of what people were taking, which is a useful reminder of how noisy hormone measurements are and how easy it is to attribute a normal fluctuation to whatever you happen to be swallowing.

What the 2025 trial does not settle

Being honest about evidence means being honest in both directions.

Thirty-eight completers is still a small study. Twelve weeks is short relative to the timescale on which pattern hair loss visibly progresses, which is measured in years. And the trial deliberately excluded men with diagnosed hair loss conditions, anyone who had used finasteride or minoxidil, and anyone who had had hair restoration work. There was no genetic screening for predisposition to androgenetic alopecia. So strictly speaking, it tells you about creatine in healthy trained men without known hair loss. It does not directly test the population that worries most: men who are already thinning and genetically loaded for it.

The trial also used a 5 g daily dose with no loading phase. The largest DHT signal in the 2009 study came during a 25 g per day loading week. Nobody has run a hair-outcome trial on a loading protocol.

None of that turns the result around. It just means the accurate summary is that the only direct evidence we have found no effect, and that it is not yet a large or long body of evidence. Review work from the International Society of Sports Nutrition group, including Antonio and colleagues on common creatine misconceptions, reaches broadly the same conclusion: the hair loss claim rests on one unreplicated hormone study and has no direct supporting data.

So should you stop taking creatine?

If you are losing hair and you are also taking creatine, the more useful question is not whether the creatine caused it. It is what your hair loss is actually doing and what you intend to do about it.

Pattern hair loss progresses on its own schedule. Most men who start creatine are in their twenties or thirties, which is exactly the window when a genetically determined hairline starts moving anyway. Correlation in that age range is nearly guaranteed, which is a large part of why this belief is so sticky.

If the worry is genuinely bothering you, the low-cost experiment is to stop creatine for three to six months while tracking photos properly. You will lose a modest amount of training performance and nothing else. But be realistic about what you will learn: hair changes slowly enough that a three-month stop rarely produces a clean answer, and if your hairline keeps receding you will have removed the wrong variable.

If you are actually losing hair, creatine is not the lever

The uncomfortable part of this topic is that the creatine debate absorbs an enormous amount of attention that would be better spent on treatments with actual regrowth data behind them.

If you have visible thinning or a receding hairline, the interventions with the strongest evidence are topical minoxidil, a DHT blocker such as finasteride or dutasteride, and in many routines microneedling layered on top. The first of those is available over the counter.

Finasteride and dutasteride are prescription medications in most countries and need a doctor. That is not a formality: they have real side effect profiles worth discussing with someone who can assess your history, and a clinician can also confirm that what you are seeing is actually pattern hair loss rather than telogen effluvium, thyroid disease or an iron deficiency that would respond to something completely different.

How to get a real answer about your own hair

Whatever you decide about the tub in your kitchen, the only way to know what your hair is doing is to measure it rather than inspect it in a bathroom mirror at unhelpful angles.

Take photos at a fixed set of angles, in the same lighting, on the same day each month: hairline straight on, temples at 45 degrees, crown from above, and a full top-down shot. Compare month three to month zero, not today to yesterday. Hair density changes are invisible on a weekly timescale and obvious on a six-month one.

If you want a structured version of this, the before-and-after tracking template on this site walks through the exact angles and checkpoints.

The bottom line

One small 2009 study found that three weeks of creatine, including a high-dose loading phase, raised serum DHT in twenty rugby players. It never measured hair, and its hormone finding has not been reliably replicated. In 2025, the first randomized controlled trial to actually assess hair follicles found no effect of 5 g per day of creatine on androgens or on any measure of hair over twelve weeks.

That is not proof of nothing forever, and the trial has real limitations. But as the evidence stands today, the case against creatine is one unreplicated hormone study, and the case for it being harmless to hair is the only trial that has ever looked. If your hair is thinning, the cause is far more likely to be sitting in your genes than in your shaker bottle.

This article is for informational purposes only and is not medical advice. Talk to a healthcare provider before starting or stopping any treatment.