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Does creatine cause hair loss or damage your kidneys?

Clinical trials show creatine does not damage healthy kidneys, while fears of hair loss trace back to a single unrepeated study of twenty rugby players.

Published October 2026

Short answer

Decades of randomised trials show creatine does not damage healthy kidneys, while evidence linking it to hair loss is limited to a single small study measuring hormone levels, with no demonstrated hair loss. Evidence grade B (Moderate). Meta-analyses demonstrate preserved kidney function, but evidence regarding hair loss is limited to a single small trial of surrogate hormone levels.

Key takeaways

  • Meta-analyses of randomised controlled trials show that creatine supplementation does not impair kidney function or reduce glomerular filtration rate in healthy adults [1] [2].
  • Creatine naturally breaks down into creatinine, causing benign blood creatinine rises that can trigger false alarms on routine kidney blood tests without actual organ damage [3] [2].
  • Concerns that creatine causes hair loss stem from a 2009 study in 20 rugby players where dihydrotestosterone (DHT) rose by 56%, but hormone levels remained within normal clinical ranges and hair loss was never measured [4].
  • Subsequent clinical trials measuring free testosterone found no increases, and no study in humans has ever demonstrated hair thinning or hair loss from creatine supplementation [3].

The short version

Creatine is one of the most thoroughly researched supplements in sports nutrition, yet concerns persist about whether it harms kidney function or causes hair loss [3]. Decades of clinical trials and systematic reviews demonstrate that recommended doses of creatine do not impair kidney filtration in healthy individuals [1] [2]. Meanwhile, fears that creatine accelerates male pattern baldness originate from a single 2009 trial of 20 rugby players that reported elevated levels of dihydrotestosterone (DHT), but hair loss was never measured and subsequent studies have not replicated the hormonal increase [4] [3].

What the studies show

Extensive clinical research demonstrates that creatine supplementation does not cause kidney damage in healthy individuals [1] [2]. In the body, creatine naturally degrades into creatinine, a metabolic waste product filtered by the kidneys and excreted in urine [3]. Because standard blood panels estimate kidney function by measuring serum creatinine, taking creatine often produces a small, harmless increase in blood creatinine levels [3] [2]. A 2025 meta-analysis of 12 clinical trials found an average increase in serum creatinine of 0.07 µmol/L during supplementation, but direct measures of glomerular filtration rate (GFR) showed no impairment in actual kidney filtering capacity [2]. An earlier systematic review of 15 clinical studies similarly found that creatine did not significantly alter serum creatinine or plasma urea values, concluding that it does not induce renal damage at studied amounts [1]. Controlled clinical trials using gold-standard isotopic clearance methods—such as 51Cr-EDTA clearance—have confirmed that kidney filtration remains stable in healthy men, postmenopausal women, and people with type 2 diabetes taking daily creatine for 12 weeks [5] [6] [7].

The widespread belief that creatine causes hair loss stems almost entirely from a single 2009 trial involving 20 college-aged male rugby players in South Africa [4]. In that study, players consumed a loading dose of 25 grams of creatine daily for 7 days, followed by 5 grams daily for 14 days [4]. Serum DHT—an androgen that can bind to scalp receptors and contribute to hair follicle miniaturisation in genetically susceptible individuals—increased by 56% after the loading phase and remained 40% above baseline after maintenance [4]. However, the researchers did not evaluate hair count, hair thickness, or shedding [4] [3]. Total testosterone levels did not change, and the players' DHT concentrations remained well within normal clinical limits throughout the trial [4] [3]. Furthermore, across 12 other clinical trials examining androgen concentrations after creatine supplementation, none reported increases in DHT, and five trials measuring free testosterone found no significant changes [3]. To date, no human clinical trial has observed hair loss or baldness as a result of taking creatine [3].

The nuances

A crucial nuance regarding kidney health is the difference between a blood marker and true kidney function [3]. When individuals consume supplemental creatine, increased circulating creatinine can lead standard calculation formulas to underestimate kidney filtration [3] [2]. However, assessing kidney health with cystatin C—a filtration biomarker independent of dietary creatine and muscle mass—confirms that renal function is preserved during supplementation [5].

This safety profile applies to healthy individuals taking standard doses of 3 to 5 grams of Creatine monohydrate daily [3]. People with pre-existing kidney disease, chronic renal failure, or glomerulonephritis have impaired clearance and should avoid creatine unless directly monitored by a nephrologist [3]. In the rare medical case reports describing acute kidney injury in supplement users, investigations have consistently identified compounding factors, including pre-existing kidney disorders, multi-ingredient contaminated products, concurrent anabolic steroid use, or extreme overdoses exceeding 100 times recommended levels [3].

Regarding hair health, male pattern baldness is predominantly driven by genetic sensitivity of hair follicles to androgens rather than circulating hormone levels alone [3]. Although vigorous exercise can cause transient hormone fluctuations, clinical trials have not shown that creatine accelerates hair loss, even among individuals with a family history of male pattern thinning [3].

What this means for you

For healthy individuals, randomised trials provide strong assurance that standard daily doses of 3 to 5 grams of Creatine monohydrate do not cause kidney damage or hair loss [3] [2]. If you undergo routine health screenings, mention your creatine use to your healthcare provider so that an elevated serum creatinine reading is not mistaken for kidney dysfunction [3]. Anyone with diagnosed kidney disease or impaired renal function should consult their physician before starting any dietary supplement [3]. For practical details on dosing regimens, potential minor stomach upset, and medication interactions, explore the comprehensive Creatine topic page [3].

Go deeper

  • Creatine — Creatine consistently increases muscle strength during resistance training in healthy adults.

References

  1. Effects of Creatine Supplementation on Renal Function: A Systematic Review and Meta-Analysis.. J Ren Nutr, 2019.
  2. Effect of creatine supplementation on kidney function: a systematic review and meta-analysis.. BMC Nephrol, 2025.
  3. Common questions and misconceptions about creatine supplementation: what does the scientific evidence really show?. J Int Soc Sports Nutr, 2021.
  4. Three weeks of creatine monohydrate supplementation affects dihydrotestosterone to testosterone ratio in college-aged rugby players.. Clin J Sport Med, 2009.
  5. Effects of creatine supplementation on renal function: a randomized, double-blind, placebo-controlled clinical trial.. Eur J Appl Physiol, 2008.
  6. Creatine supplementation does not impair kidney function in type 2 diabetic patients: a randomized, double-blind, placebo-controlled, clinical trial.. Eur J Appl Physiol, 2011.
  7. Effect of creatine supplementation on measured glomerular filtration rate in postmenopausal women.. Appl Physiol Nutr Metab, 2011.