Does Creatine Cause Hair Loss? What One RCT Finally Proved (2026)

The 2025 RCT that finally tested hair directly

For 16 years, every article about creatine and hair loss had to rely on indirect evidence because no one had actually measured hair. That changed in April 2025 when Lak et al. published the first randomized controlled trial designed to assess both hormones and hair follicle health during creatine supplementation.

The study design was straightforward: 45 resistance-trained males aged 18–40 were randomly assigned to either 5 g/day of creatine monohydrate or a placebo (maltodextrin) for 12 weeks. Researchers measured serum testosterone, free testosterone, and DHT at baseline and at week 12. They also evaluated hair density, follicular unit count, and cumulative hair thickness using trichogram analysis and the FotoFinder system: tools specifically designed to detect changes in hair growth patterns.

The results were unambiguous. There were no significant group-by-time interactions for any hormone. Testosterone, free testosterone, DHT, and the DHT-to-testosterone ratio all remained statistically indistinguishable between groups. More importantly, none of the hair growth parameters showed any meaningful difference between creatine users and placebo. (PMID: 40265319)

The authors' conclusion: this was "the first study to directly assess hair follicle health following creatine supplementation," providing "strong evidence against the claim that creatine contributes to hair loss in healthy young males."

Where the myth started: one study, 20 rugby players, zero hair measurements

If you search "creatine hair loss," virtually every result traces back to a single 2009 paper by van der Merwe, Brooks, and Myburgh, published in the Clinical Journal of Sport Medicine. Here is exactly what that study did and did not find.

What it found: 20 college-aged South African rugby players took creatine (25 g/day loading for 7 days, then 5 g/day for 14 days) or placebo in a crossover design. After the loading phase, the DHT-to-testosterone ratio increased by 56% in the creatine group compared to baseline, then settled at 40% above baseline during the maintenance phase. (PMID: 19741313)

What it did not find: The study never measured hair loss, hair density, follicle count, or any hair parameter whatsoever. It was a hormone study, not a hair study. The word "hair" does not appear in the results section.

What the internet did with it: Because DHT is the primary androgen implicated in androgenetic alopecia (male pattern baldness), health media extrapolated "higher DHT" into "creatine causes hair loss." This leap assumed that a 3-week DHT spike in 20 rugby players during a high-dose loading phase would translate into visible hair loss in the general population taking standard doses: an assumption that no subsequent study has supported.

The meta-analysis that found no DHT effect

In 2021, Antonio et al. conducted the largest pooled analysis to date: a systematic review and meta-analysis examining creatine's effects on testosterone and DHT across 12 studies with a combined 276 participants. The conclusion was clear: creatine supplementation produced no statistically significant changes in total testosterone, free testosterone, or DHT. (PMID: 34199923)

Put differently, the 2009 van der Merwe finding stands alone — none of the 11 subsequent studies that measured these hormones could replicate it. A single unreplicated result in 20 participants, without any hair outcome measurement, is the entire empirical foundation of the "creatine causes hair loss" claim.

The ISSN's 2025 position update (Antonio et al., Part II) explicitly addressed the myth: "There is currently no direct evidence that creatine supplementation promotes hair loss." (DOI: 10.1080/15502783.2024.2441760)

Does creatine increase DHT? The full picture

This question gets asked separately from "does creatine cause hair loss" because it's a more targeted biochemical inquiry. The answer, based on the totality of evidence through 2025, is: almost certainly not at standard doses.

The 2009 van der Merwe study remains the only trial to report a positive finding, and there are specific methodological reasons to interpret it cautiously. The loading phase used 25 g/day: five times the standard maintenance dose. This supraphysiological dosing creates acute metabolic conditions that don't reflect typical creatine use. The study also lasted only 3 weeks, far too short to determine whether any hormonal fluctuation would stabilize, persist, or reverse over time. And the DHT increase was measured as a ratio to testosterone (DHT:T ratio), not as an absolute increase, meaning a decrease in testosterone denominator could produce the same ratio change as an increase in DHT.

Jose Antonio, PhD, a professor at Nova Southeastern University and lead author of both the 2021 meta-analysis and the ISSN position stands on creatine, has been direct about this: the van der Merwe finding is an isolated result that has not been replicated despite multiple opportunities. In a field where replication is the standard for establishing biological effects, a single unreplicated finding in 20 participants does not meet the evidential threshold for a causal claim.

Scott Forbes, PhD, an associate professor at Brandon University and co-author of the 2025 Lak trial, added practical context in a post-publication commentary: even if creatine did transiently raise DHT during a loading phase (which the evidence doesn't support), the clinical significance for hair would be negligible because hair loss from androgen exposure is a process that unfolds over months to years, not weeks. A 3-week hormonal fluctuation, even if real, would be biologically inconsequential for hair follicle cycling.

How DHT and hair loss actually work

Understanding why the creatine-hair-loss connection is mechanistically implausible requires a brief detour through androgen biology.

Testosterone is converted to dihydrotestosterone (DHT) by the enzyme 5-alpha reductase, primarily in the prostate, skin, and hair follicles. In genetically susceptible individuals, DHT binds to androgen receptors on scalp hair follicles, triggering a process called follicular miniaturization: the gradual shrinking of follicles that produces thinner, shorter hair until growth eventually stops. This is androgenetic alopecia, the most common form of hair loss in men.

The critical factor is not systemic DHT levels in the blood, but local DHT activity at the follicle level, which is determined by genetics (specifically, the sensitivity of your androgen receptors and the local expression of 5-alpha reductase in scalp tissue). This is why some men with high circulating DHT keep full heads of hair into their 80s, while others with average DHT levels begin thinning in their 20s.

Even if creatine did raise systemic DHT (which the 2021 meta-analysis says it does not), that would not predict hair loss unless the individual already carried the genetic vulnerability. And no study has measured creatine's effect on scalp-level DHT activity.

Study comparison: every trial that measured creatine and androgens

Study	n	Duration	Dose	DHT change?	Hair measured?
van der Merwe 2009	20	3 weeks	25 g → 5 g	↑ DHT:T ratio	❌ No
Antonio et al. 2021 (meta-analysis)	276	Various	3–25 g	No significant change	❌ No
Lak et al. 2025 (RCT)	45	12 weeks	5 g/day	No significant change	✅ Yes: no effect

The only study that found a DHT change (van der Merwe 2009) used a high loading dose, ran for only 3 weeks, and never measured hair. The two subsequent investigations with larger samples and longer durations found no hormonal effect, and the only one that checked hair found no impact.

Timeline: how a single study became a global myth

Understanding how the creatine-hair-loss connection went viral reveals more about internet health misinformation than about creatine biochemistry.

2009: van der Merwe et al. publish a 3-week study of 20 South African rugby players showing an elevated DHT:T ratio during a creatine loading phase. The study's own conclusion is cautious: "further investigation is warranted." The word "hair" does not appear anywhere in the paper.

2010–2014: Health media outlets pick up the study. Headlines mutate from "creatine may increase DHT" to "creatine linked to hair loss" to "creatine causes baldness." Each retelling drops another qualifier. Blog posts and forum discussions amplify the claim without citing the original paper or noting that hair was never measured.

2015–2020: The myth becomes self-reinforcing. Men who are already genetically predisposed to hair thinning (which affects roughly 50% of men by age 50, according to dermatology prevalence data) start creatine, notice hair changes that were going to happen regardless, and attribute them to the supplement based on what they've read online. Confirmation bias cements the association.

2021: Antonio et al. publish a systematic review and meta-analysis of 12 studies measuring creatine's effects on testosterone and DHT. Finding: no statistically significant effect on any androgen. The van der Merwe result is officially an outlier. But the meta-analysis receives a fraction of the media attention that the original 2009 study got. Negative findings rarely go viral.

2025: Lak et al. publish the first RCT that actually measures hair during creatine supplementation. Result: no effect on hair density, follicular count, or cumulative thickness. The ISSN position update (Part II) explicitly states there is no direct evidence linking creatine to hair loss. The scientific consensus is now clear, but Google still shows "does creatine cause hair loss" at 20,000 monthly searches.

The lesson: a single small study with an indirect finding, amplified by media oversimplification and confirmation bias, can create a myth that persists for over 15 years, even after the scientific community has moved on. This pattern isn't unique to creatine; it's a recurring feature of supplement misinformation.

It also helps to understand why this particular myth has proven so durable when others fade. Creatine sits at an unusual intersection: it is wildly popular among exactly the demographic most anxious about hair loss, namely men in their late teens through thirties who lift weights. That overlap guarantees a steady stream of people who start creatine and notice thinning at roughly the same life stage, purely by coincidence of timing. Add the emotional weight that hair loss carries, the speed at which a single alarming headline spreads on social media, and the natural human tendency to seek a controllable cause for an uncontrollable genetic process, and you have the perfect conditions for a myth that outlives the evidence meant to correct it. Understanding that psychology is itself reassuring: the persistence of the claim reflects how it spreads, not how true it is.

What dermatologists actually say about creatine and hair

Board-certified dermatologists who specialize in hair loss (trichologists) have been surprisingly consistent in their messaging on this topic. Largely because the dermatology literature never took the creatine-hair connection seriously in the first place.

Antonella Tosti, MD, a professor of clinical dermatology at the University of Miami and one of the world's most-cited hair loss researchers, has noted in clinical commentary that androgenetic alopecia is overwhelmingly determined by genetics and age, not by supplementation with physiological compounds like creatine. The relevant genetic factors: androgen receptor sensitivity on the X chromosome and the activity of scalp-level 5-alpha reductase, are set before a person ever touches a supplement.

Jerry Shapiro, MD, a clinical professor of dermatology at NYU Langone and a leading expert on male pattern hair loss, has emphasized in educational presentations that patients frequently attribute their hair loss to whatever new supplement or dietary change coincided with noticing thinning, when in reality, androgenetic alopecia is a gradual process that was progressing for months or years before it became visible. The temporal coincidence of starting creatine and noticing hair loss is exactly that: coincidence, not causation.

The practical dermatological recommendation for patients concerned about creatine: if you have no family history of significant hair loss and no current thinning, creatine is not a hair risk factor based on any available evidence. If you have active androgenetic alopecia or strong family history, the risk from creatine is theoretical and unproven, but discussing it with your dermatologist before starting is reasonable, not because the evidence suggests harm, but because the evidence gap in genetically predisposed populations hasn't been closed.

The genetics factor: why some men lose hair regardless

Androgenetic alopecia affects approximately 50% of men by age 50 and 80% by age 70, according to epidemiological data compiled by the American Academy of Dermatology. This prevalence means that in any group of men who start taking creatine, a substantial proportion will experience hair thinning, because they were going to experience it anyway.

The genetics are well-characterized. The androgen receptor gene (AR) on the X chromosome is the strongest single genetic predictor of male pattern hair loss. Variants in this gene determine how sensitively hair follicles respond to DHT. Additional genetic loci (including variants near the 20p11 and 3q25 chromosomal regions) contribute to the polygenetic risk profile. By age 18, your genetic susceptibility to androgenetic alopecia is essentially fixed; no supplement you take afterward will create that susceptibility where it doesn't exist.

This is precisely why the 2025 Lak trial, conducted in healthy men without diagnosed hair loss disorders, found zero hair effects from creatine: these men either didn't carry significant genetic susceptibility, or their androgenetic alopecia hadn't progressed enough to be measurable in a 12-week window. What the study proves is that creatine doesn't initiate hair loss in non-susceptible individuals. What it cannot prove (because it wasn't designed to) is whether creatine accelerates the timeline in men who are already genetically destined for significant thinning. That study hasn't been done yet.

For men who are worried: genetic risk assessment for androgenetic alopecia is available through some direct-to-consumer genetic testing services, though the clinical utility of these tests remains debated. The simplest predictor is still family history, particularly your maternal grandfather's hair pattern, since the AR gene is inherited on the X chromosome from your mother's side.

The American Hair Loss Association's balanced take

Not everyone considers the case closed. In April 2026, the American Hair Loss Association (AHLA) published a critical review noting that the Lak 2025 study included only 38 completers, excluded individuals with diagnosed hair loss disorders, did not screen for genetic predisposition to androgenetic alopecia, and did not measure DHT activity at the scalp — where pattern hair loss actually occurs.

The AHLA's position is worth quoting in spirit: the study provides the best direct evidence to date, but it cannot rule out that creatine might accelerate hair loss in men who already carry the genetic susceptibility. The absence of evidence in a small, short-term trial of healthy men is not the same as evidence of absence in the genetically predisposed population.

This is a fair and important caveat. If you have a strong family history of male pattern baldness or are already experiencing thinning, the question is genuinely unanswered for your specific situation, and talking to a dermatologist before starting creatine is reasonable.

Creatine supplement comparison: what to buy

The good news about buying creatine is that it's far simpler than shopping for mushroom or shilajit supplements. Creatine monohydrate is a single, well-characterized molecule. Unlike botanical extracts, there's no ambiguity about what the active compound is. The primary differentiators between products are purity, form factor, and what else is in the formula.

Brand	Form	Creatine/Serving	Type	Extras	3rd-Party Tested	~Price/Month
YourHealthier Creatine Hydration Powder	Powder	5 g	Monohydrate	Electrolytes (Na, K, Mg)	✓	$24.99
Thorne Creatine	Powder	5 g	Monohydrate (Creapure)	None	✓ (NSF)	$30–35
Transparent Labs Creatine HMB	Powder	5 g	Monohydrate (Creapure)	HMB + Vitamin D	✓	$35–40
Optimum Nutrition Micronized Creatine	Powder	5 g	Monohydrate (micronized)	None	✓ (Informed Sport)	$15–20
NOW Sports Creatine Monohydrate	Powder	5 g	Monohydrate	None	✓ (GMP)	$12–18

Prices approximate as of mid-2026. All products listed use creatine monohydrate, the only form with extensive safety data, including the 2025 hair study.

The key differentiator of our Creatine Hydration Powder is the electrolyte integration. Creatine pulls water into muscle cells (that's its mechanism for increasing cell volume and phosphocreatine stores), which can shift your hydration balance. Adding sodium, potassium, and magnesium to the same scoop addresses this directly. It's a formulation choice based on physiology, not marketing, and it's why we specifically call it a "hydration powder" rather than just "creatine."

Creatine monohydrate side effects: separating real from myth

While we're debunking the hair-loss claim, it's worth addressing the other common creatine concerns, because the evidence picture is clearer than most people realize.

Water retention: Real. Creatine increases intracellular water content. This is the actual mechanism by which it increases cell volume. Initial weight gain of 1–3 lbs during the first week is typical and represents water, not fat. This stabilizes after the loading phase (or after 2–3 weeks at maintenance dose). For detailed guidance on managing this, see our creatine weight gain guide.

Kidney damage: Myth for healthy individuals. The 2017 ISSN position stand reviewed over 500 studies and concluded that creatine does not damage kidneys in healthy individuals at recommended doses. Creatine supplementation does increase creatinine levels (a kidney function marker), which can trigger false alarms on standard blood tests. If your doctor sees elevated creatinine, inform them you take creatine. The elevation is expected and not indicative of kidney damage. (PMID: 28615996)

Bloating: Partially real. Some users experience GI discomfort, particularly during high-dose loading phases (20–25 g/day). At maintenance doses (3–5 g/day), this is uncommon. Taking creatine with food and adequate water reduces GI issues. Micronized creatine dissolves more easily and may be gentler on the stomach. See our creatine bloating guide.

Muscle cramps: Myth. A 2003 study by Dalbo et al. specifically tested this and found no increase in cramping among creatine users. The ISSN position stand confirms that creatine does not increase cramp incidence, in fact, some evidence suggests it may reduce cramping by improving hydration status.

Liver damage: Myth. Multiple studies have measured liver enzymes during creatine supplementation and found no elevations. Creatine is metabolized to creatinine (a waste product) and excreted by the kidneys, not the liver.

Creatine and hair loss in women specifically

This topic deserves its own section because the question comes up frequently and the answer is straightforward: there is no evidence: none. That creatine causes hair loss in women.

Female pattern hair loss (androgenetic alopecia in women) has a different mechanism than male pattern hair loss. It presents as diffuse thinning over the crown rather than the hairline recession typical in men, and it's less directly driven by DHT. The primary contributing factors in women are genetics, hormonal changes (particularly around menopause), iron deficiency, thyroid disorders, and stress, not androgen levels. (PMID: 17658740)

Women produce far less testosterone and DHT than men. Even if creatine did increase DHT conversion (which the meta-analysis says it doesn't), the absolute magnitude in women would be biologically trivial. The Abigail Hagstrom 2025 trial at UNSW Sydney (the most thorough study of creatine in women) measured multiple performance and physiological outcomes and reported no adverse effects on hair, skin, or hormonal markers.

Bottom line: if you're a woman hesitating to take creatine because of the hair-loss myth, the concern is even less applicable to you than it is to men. See our full guide at Creatine for Women: Benefits & Safety.

Who should be cautious

Most people have nothing to worry about. The current evidence strongly suggests that creatine at standard doses (3–5 g/day) does not cause hair loss in healthy individuals. But "most people" is not "everyone," and intellectual honesty requires naming the edge cases:

Active thinning or diagnosed androgenetic alopecia. If you're already experiencing pattern hair loss, no study has tested creatine in this population. We cannot tell you it's safe for your hair because nobody has checked.

Strong family history (father and/or maternal grandfather with significant hair loss before 40). You may carry the androgen receptor sensitivity that makes DHT more consequential. The 2025 RCT excluded this population.

On finasteride or dutasteride. These drugs work by blocking 5-alpha reductase (the enzyme that converts testosterone to DHT). If creatine did affect this pathway, it could theoretically counteract your medication. Though again, the meta-analysis found no significant DHT change. Discuss with your prescriber.

Everyone else. Including women, older adults, and people with no family history of hair loss: can take creatine with confidence that current evidence shows no hair impact. The ISSN, the world's largest sports nutrition research body, has explicitly stated there is no direct evidence linking creatine to hair loss. (PMID: 28615996)

What actually causes hair loss in young men

If creatine isn't the culprit, what is? Understanding the real causes of hair thinning puts the supplement question in proper context, and may help identify issues that are actually addressable.

Androgenetic alopecia (genetics): Responsible for 95% of male hair loss. The timeline is predetermined by your DNA. First signs typically appear in the late teens to mid-20s, which, not coincidentally, is when many men first start taking creatine for gym performance. The temporal overlap creates the false impression of causation.

Telogen effluvium (stress-related shedding): Acute physical or emotional stress can push a large number of hair follicles into the resting phase simultaneously, resulting in noticeable shedding 2–3 months later. Common triggers include significant weight loss, surgery, illness, severe emotional stress, and major dietary changes. This type of hair loss is usually temporary and reversible once the stressor is removed.

Nutritional deficiencies: Iron deficiency (the most common nutritional cause of hair loss worldwide), zinc deficiency, and vitamin D deficiency can all contribute to hair thinning. Men who adopt aggressive cutting diets while training (restricting calories and food variety) may inadvertently create these deficiencies. Ironically, creatine supplementation is often started alongside restrictive dieting, creating another false association.

Thyroid dysfunction: Both hypothyroidism and hyperthyroidism can cause diffuse hair thinning. This is a medical condition requiring treatment, not a supplement side effect.

Medication side effects: Certain medications, including some antidepressants, blood pressure medications, and acne treatments (notably isotretinoin): list hair loss as a documented side effect. If you recently started a new medication and noticed hair changes, that's a more evidence-based explanation than creatine.

The pattern is clear: hair loss has many well-established causes, all of which are more likely than a supplement that has been tested in over 500 studies without any documented hair-loss effect. If you're experiencing hair changes, a dermatologist can identify the actual cause, and it almost certainly isn't the creatine in your gym bag.

If you're still worried: the practical monitoring protocol

For those who want to use creatine but can't shake the concern, dermatologists suggest a simple self-monitoring approach:

Baseline photos. Before starting creatine, take clear, well-lit photos of your hairline and crown from consistent angles. Use your phone's timer for repeatability.

3-month check. Retake the same photos at 12 weeks (matching the Lak et al. study duration). Compare honestly. If you see no change (and the data says you won't) continue with confidence.

6-month reassessment. One more round of photos. At this point, any creatine-related effect (if it existed) would be visible.

If you notice genuine thinning at any point, pause creatine and see a dermatologist. But the most common outcome of this exercise is reassurance. People realize their hair was fine all along, and their worry was driven by the myth, not by their mirror.

What about our Creatine Hydration Powder?

Our Creatine Hydration Powder delivers 5 g of creatine monohydrate per serving. The exact dose used in the Lak 2025 RCT that found no impact on hair or hormones. It also includes electrolytes (sodium, potassium, magnesium) to support hydration during training.

Creatine monohydrate is the only form with extensive safety data. Our product uses no loading phase: 5 g/day is the evidence-based daily dose for both performance and the hair-safety data.

Related reading

• Is Creatine Safe? What 500+ Studies Show
• Creatine for Women: Benefits & Safety
• Does Creatine Make You Gain Weight? Water vs Muscle
• Does Creatine Cause Bloating? Truth Explained
• Creatine Loading Phase: Do You Actually Need It?
• When to Take Creatine: Morning, Night, or With Meals?
• Creatine HCl vs Monohydrate: Which Works Better?
• Creatine for Older Adults: 7 Benefits Beyond Muscle
• Creatine for Brain Health & Focus
• Creatine Before or After Workout? 3 RCTs Settle It
• How Long Does Creatine Take to Work?
• Best Creatine for Men in 2026
• Best Supplement Stack for Muscle Growth
• Ashwagandha for Men: Testosterone, Muscle & Fertility

Frequently asked questions

References

1. Lak M, Forbes SC, Ashtary-Larky D, et al. "Does creatine cause hair loss? A 12-week randomized controlled trial." J Int Soc Sports Nutr. 2025;22(sup1):2495229. PubMed
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." Clin J Sport Med. 2009;19(5):399-404. PubMed
3. Antonio J, Candow DG, Forbes SC, et al. "Common questions and misconceptions about creatine supplementation: what does the scientific evidence really show?" J Int Soc Sports Nutr. 2021;18(1):13. PubMed
4. Antonio J, Brown AF, Candow DG, et al. "Part II. Common questions and misconceptions about creatine supplementation: what does the scientific evidence really show?" J Int Soc Sports Nutr. 2025;22(1):2441760. DOI
5. Kreider RB, Kalman DS, Antonio J, et al. "International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine." J Int Soc Sports Nutr. 2017;14:18. PubMed
6. Olsen EA, Messenger AG, Shapiro J, et al. "Evaluation and treatment of male and female pattern hair loss." J Am Acad Dermatol. 2005;52(2):301-311. PubMed