Creatine and Hair Loss

Where the hair-loss concern comes from

The worry that creatine might contribute to hair loss rests largely on a 2009 double-blind, placebo-controlled crossover trial in 20 college-aged male rugby players. After seven days of high-dose loading (25 g/day) followed by a 5 g/day maintenance phase, serum testosterone was unchanged, but DHT rose by roughly 56% and the DHT-to-testosterone ratio increased by about 36%, with values remaining elevated through the maintenance period. Because DHT is the androgen most associated with male-pattern hair loss, this hormonal shift became the basis for the popular claim.^[1]

Two limitations are central to interpreting that study. First, it measured circulating hormone concentrations, not hair density, follicle counts, or any balding outcome, so a change in DHT is a proposed mechanism rather than an observed effect on hair. Second, it was a single small trial using a loading protocol, and the authors themselves framed their findings as warranting further investigation rather than as evidence of harm.^[1]

What the trial that measured hair actually found

A 2025 randomized controlled trial was the first to assess hair follicle health directly after creatine supplementation. Forty-five resistance-trained healthy men aged 18-40 took either 5 g/day creatine or a matching maltodextrin placebo for 12 weeks, with hair evaluated by the Trichogram test and the FotoFinder system (hair density, follicular unit count, and cumulative hair thickness). Among the 38 who completed the study, there were no significant group-by-time differences in DHT, the DHT-to-testosterone ratio, or any hair growth parameter compared with placebo.^[2]

This trial provides the most relevant direct evidence to date because it measured the outcome people actually care about. Even so, it is a single study with a small completed sample, a short 12-week window, a population of only healthy young men, and authors who disclosed financial ties to supplement companies. Those factors mean the absence of an observed effect should be read as reassuring but preliminary, not as a guarantee that creatine has no influence on hair in any individual or over longer time frames.^[2]

The bottom line on the current evidence

Weighing both trials, the direct human evidence on creatine and hair loss is limited and not conclusive. One early study found a hormonal change but never examined hair, and the one study that examined hair found no effect; no large or long-term trial has tracked balding outcomes. On this basis it is not accurate to say creatine causes hair loss, and it is equally premature to declare it has no effect on hair. The honest summary is that the question remains open and under-studied.^{[1], [2]}

Evidence limitations

The entire direct evidence base consists of two small randomized trials with different aims. The 2009 study measured only blood androgens in 20 rugby players using a loading dose and did not assess hair; the 2025 study measured hair in 38 completers at 5 g/day over 12 weeks but was short, limited to healthy young men, and carried author conflicts of interest. Neither study can speak to long-term use, older or genetically predisposed individuals, or large populations.^{[1], [2]}

Because the available trials are few, small, and partly conflicting, the question of whether creatine affects hair loss cannot be resolved with confidence in either direction. This article describes what the studies measured and found; it is not medical advice, and anyone with specific concerns about hair loss should consult a qualified healthcare professional.^{[1], [2]}