Does Creatine Cause Hair Loss?

The creatine-and-hair-loss claim has survived for years because it contains one biologically plausible step: dihydrotestosterone, or DHT, contributes to androgenetic alopecia in genetically susceptible hair follicles.

But a plausible mechanism is not the same as a demonstrated outcome.

The best direct evidence available does not show that standard-dose creatine causes hair loss. The concern began with one small study that measured hormones but did not measure hair. A newer randomized trial finally measured both—and found no creatine-related change in DHT, hair density, follicular units, or cumulative hair thickness over 12 weeks.

That result is reassuring. It is not absolute proof that no person could ever experience an effect, and it does not settle lifelong use. It does shift the burden of proof: the popular warning is much stronger than the evidence behind it.

Where the hair-loss rumor came from

The story traces mainly to a 2009 double-blind crossover study in 20 college-aged male rugby players. Participants used a creatine-loading protocol of 25 grams per day for seven days, followed by 5 grams per day for another 14 days. Serum testosterone did not change, but DHT rose 56% from baseline after the loading phase and remained 40% above baseline after the maintenance phase. The DHT-to-testosterone ratio also increased.

That finding deserved follow-up. It did not demonstrate hair loss.

The study measured circulating hormones for three weeks. It did not measure shedding, hair density, follicle count, hair thickness, or progression of androgenetic alopecia. It also used a high-dose loading phase, involved a small and narrow sample, and the hormonal result was not the same as showing that scalp follicles were being miniaturized.

A 2021 evidence review examined the broader creatine literature and noted that the 2009 DHT finding had not been replicated. Across the available studies of creatine and androgen concentrations, the evidence did not support a consistent increase in total testosterone, free testosterone, or DHT—and no human study at that time had directly reported creatine-induced baldness.

The internet compressed a weak chain of inference into a confident claim:

Creatine increased DHT in one small study → DHT is involved in pattern hair loss → creatine causes baldness.

The missing step was whether people taking creatine actually developed measurable hair changes.

The first trial to measure hair directly

In 2025, researchers published a 12-week randomized, double-blind, placebo-controlled trial designed to answer that missing question. Forty-five resistance-trained men ages 18 to 40 were assigned to either 5 grams per day of creatine monohydrate or 5 grams per day of maltodextrin placebo. Thirty-eight completed the study.

The investigators measured total testosterone, free testosterone, DHT, and the DHT-to-testosterone ratio. They also used a trichogram and a FotoFinder imaging system to measure hair density, follicular unit count, and cumulative hair thickness. There were no significant differences between the creatine and placebo groups for DHT or any measured hair outcome.

That matters because this trial tested the outcome people actually care about. It did not merely ask whether a hormone moved. It looked for changes in the hair itself.

The absence of a statistically significant difference is not proof of universal zero risk. But the study found no directional signal suggesting that standard-dose creatine was thinning hair over the study period. For the common claim that “creatine makes you bald,” this is directly relevant negative evidence.

What the new trial does not prove

The trial is reassuring, but it is still one small study.

• It lasted 12 weeks. Androgenetic alopecia usually evolves over much longer periods. A short study is better suited to detecting early changes than ruling out every possible long-term effect.
• It included only men ages 18 to 40. The result cannot automatically be generalized to women, older adults, adolescents, or people with active hair-loss disorders.
• It did not record family history of hair loss. That makes it harder to know whether a genetically high-risk subgroup might respond differently.
• It tested 5 grams per day without a loading phase. It does not directly reproduce the 25-gram loading protocol used in the 2009 rugby study.
• Several authors disclosed supplement-industry advisory relationships. The paper reported no specific study funding, but the disclosures are still relevant when interpreting a small trial.

These limitations argue for more and longer research. They do not reverse the result.

DHT is part of the biology, not a baldness switch

Androgenetic alopecia depends on the interaction between androgens and genetically susceptible follicles. DHT can bind androgen receptors in susceptible scalp follicles and contribute to progressive miniaturization: the hairs become finer, shorter, and less visible over time.

But circulating DHT is not a simple on-off switch. People differ in follicular sensitivity, local androgen metabolism, age, family history, and baseline hair-loss pattern. A temporary change in serum DHT would not automatically establish that scalp follicles were exposed to a clinically meaningful change, much less that visible hair loss occurred.

This is why the direct hair measurements matter more than the hormone rumor. The 2025 trial assessed both and found neither a creatine-specific androgen signal nor a hair signal.

Why anecdotes remain persuasive

Many people begin creatine in the same age range when genetically driven pattern hair loss first becomes noticeable. They may also start harder training, change calories, lose weight, experience stress, use other supplements, or pay closer attention to their appearance at the same time.

If thinning becomes visible shortly after creatine use begins, the timing feels causal. Sometimes a personal stop-and-restart experiment strengthens that impression. But hair cycling is slow, day-to-day shedding is noisy, and informal observation is highly vulnerable to changes in lighting, hairstyle, haircut, washing frequency, and attention.

Anecdotes are useful for generating questions. They are weak for estimating causality, especially when the expected outcome is common and develops gradually.

What this means if you use creatine

Creatine monohydrate has a much stronger evidence base for improving resistance-training outcomes than it has for causing hair loss. A recent systematic review and meta-analysis found small but significant improvements in several strength and power measures when creatine was combined with resistance training. The effects were not uniform across every outcome, but the overall performance signal was favorable.

If creatine fits your goals, the hair-loss rumor alone is not a strong evidence-based reason to avoid it. A practical approach is straightforward:

• Use plain creatine monohydrate. It is the form with the deepest research base. A common maintenance dose is 3 to 5 grams per day. Loading is optional, not required.
• Do not use daily shedding as your dashboard. If hair is a major concern, take standardized baseline photos in the same lighting, angle, hair length, and styling conditions, then compare over months rather than days.
• Do not assume new hair loss is a supplement side effect. Pattern hair loss, telogen effluvium, thyroid disease, iron deficiency, medication effects, illness, rapid weight loss, and scalp disorders can overlap. The pattern and timing matter.
• If you notice persistent thinning, get the diagnosis right. A primary-care clinician or dermatologist can distinguish patterned miniaturization from diffuse shedding and other causes more reliably than a supplement elimination test alone.
• A cautious personal trial is reasonable. If the uncertainty is unacceptable to you, not taking creatine is a valid preference. Just be clear that this is a risk-tolerance decision, not a conclusion established by current evidence.

The bottom line

The creatine hair-loss claim began with a small 2009 study that found a short-term rise in DHT but did not measure hair. Broader research did not establish a consistent androgen effect, and the first randomized trial to directly measure hair outcomes found no difference between 5 grams per day of creatine and placebo over 12 weeks.

Current evidence does not support saying that creatine causes hair loss.

The honest residual uncertainty is narrower: we still need longer studies, larger samples, women, older adults, and people stratified by genetic risk. That is a reason to keep studying the question—not a reason to treat an unproven side effect as settled fact.

This Field Note is for general educational purposes and is not individualized medical advice. Persistent or rapidly progressive hair loss deserves evaluation for the actual pattern and cause.

Sources and further reading

1. Lak M et al. Does creatine cause hair loss? A 12-week randomized controlled trial. Journal of the International Society of Sports Nutrition. 2025.
2. van der Merwe J, Brooks NE, Myburgh KH. Three weeks of creatine monohydrate supplementation affects dihydrotestosterone to testosterone ratio in college-aged rugby players. Clinical Journal of Sport Medicine. 2009.
3. Antonio J et al. Common questions and misconceptions about creatine supplementation: what does the scientific evidence really show? Journal of the International Society of Sports Nutrition. 2021.
4. The Effects of Creatine Supplementation on Upper- and Lower-Body Strength and Power: A Systematic Review and Meta-Analysis. 2025.