Is Creatine Safe to Take?
Safety of creatine supplementation: analysis of the prevalence of reported side effects in clinical trials and adverse event reports
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
More studies reported muscle cramps with creatine — but fewer than 1% of actual users experienced them.
This contradicts the widespread belief that creatine causes cramps. While 2.9% of studies mentioned cramping, only 0.52% of participants actually reported it — and the difference vs. placebo (0.07%) wasn’t statistically significant (p = 0.085).
Practical Takeaways
You can safely take creatine daily at 3–5 grams for performance, recovery, or health without worrying about side effects.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
More studies reported muscle cramps with creatine — but fewer than 1% of actual users experienced them.
This contradicts the widespread belief that creatine causes cramps. While 2.9% of studies mentioned cramping, only 0.52% of participants actually reported it — and the difference vs. placebo (0.07%) wasn’t statistically significant (p = 0.085).
Practical Takeaways
You can safely take creatine daily at 3–5 grams for performance, recovery, or health without worrying about side effects.
Publication
Journal
Journal of the International Society of Sports Nutrition
Year
2025
Authors
R. Kreider, Drew E. Gonzalez, Kelly Hines, Adriana Gil, D. Bonilla
Related Content
Claims (6)
Taking creatine every day for years — even up to 14 years — doesn’t seem to cause more side effects than a fake pill, no matter your age, health, or fitness level.
People taking creatine don’t seem to get muscle cramps much more than those taking a fake pill — the difference is small and might just be due to chance, so we can’t say creatine causes cramps.
Taking creatine doesn't seem to cause more stomach problems than a fake pill — the difference in upset stomachs between users and non-users is tiny and probably just due to chance.
Taking creatine doesn't hurt your kidneys — studies show no difference in kidney or liver health markers between people who take creatine and those who don't.
Creatine doesn’t seem to cause many problems in real life — out of millions of reports, hardly any mention it, and most of those also involve other supplements or medicines.