Should I Take Creatine?
Creatine has been studied for decades and it keeps coming out on top. If you train hard and want a cheap, safe edge in short bursts of output, this is the most evidence-based supplement you can buy.
What Creatine Actually Does
Creatine helps your body recycle energy faster. Your muscles store it as phosphocreatine, which regenerates ATP during the first few seconds of a hard effort. More phosphocreatine means more reps, more power, and faster repeats before fatigue sets in.[2]
The performance gain is most visible in short, intense bursts. Think heavy lifts, sprints, and high-output metcons. Longer steady-state work benefits less, because aerobic energy systems don't rely on the same phosphocreatine pathway.[2]
Why It's a No-Brainer for Athletes
Solid research base. Multiple meta-analyses confirm small but reliable gains in strength and high-intensity output. See the 5g-a-day breakdown for the CrossFit-specific evidence.[2][4]
Safe for healthy athletes. Long-term studies (up to five years) show no negative effects on kidney or liver function in healthy individuals.[3]
Cheap. A month of creatine monohydrate costs less than a single post-workout shake.[4]
Extra upside in some populations. Cognitive benefits show up in people with low baseline intake, like vegetarians, older adults, and the sleep-deprived. That's a real effect for people running low, not just better nutrition overall.[2]
What About Non-Responders and Side Effects?
Not everyone responds. Roughly one in four people see little to no benefit, attributed to Syrotuik and Bell's 2004 study. If you have high baseline muscle creatine, fewer fast-twitch fibers, or a smaller muscle cross-section, you may sit in that group. Still worth trying, because the cost is low and the upside is real.[1]
A small number of users get gastric discomfort. The most reliable fix is taking it with meals or splitting the daily dose into smaller amounts throughout the day. If that doesn't help, a different form (like a capsule or a buffered version) is worth a try.[4]
How to Start
Take 3 to 5 grams of creatine monohydrate per day. Timing doesn't matter much, but consistency does. You can load at 20 grams per day for the first week if you want saturation faster, though it's not necessary. Mix it into water, a shake, or whatever you'll actually drink every day.[2]
If your weight jumps by 1 to 2 kilograms in the first couple of weeks, that's water inside the muscle, not fat. It's harmless and it usually settles once your intake is consistent. For the full explanation, see why creatine makes you weigh more.[1]
Key Takeaways
Creatine works by recycling energy. More phosphocreatine, more ATP, more output in short bursts.[2]
It's safe, cheap, and well-studied. No credible evidence of harm in healthy athletes, and the cost is minimal.[3][4]
Most people see a benefit. Roughly three in four respond well. If you're in the other one in four, the downside is just money.[1]
Daily dosing beats loading. 3 to 5 grams a day, every day, is enough. Skip the loading phase if you don't want the temporary water weight.[1][2]
Frequently Asked Questions
Does creatine cause weight gain?
Creatine pulls water into your muscle cells, so scale weight typically rises 1 to 2 kilograms in the first weeks. This is intracellular water, not fat, and it does not affect body composition or performance negatively.[1]
Should I load creatine or just take a maintenance dose?
Both work. Loading at 20 grams a day for 5 to 7 days saturates muscles faster but causes more water retention and occasional stomach upset. A maintenance dose of 3 to 5 grams daily reaches the same saturation in about three to four weeks, with fewer side effects.[1][2]
Is creatine safe long-term?
Yes. Studies up to five years of daily use in healthy individuals show no negative effects on kidney, liver, or cardiovascular health. Hydration and normal dosing are the only practical considerations.[3][4]
Bronnen
Syrotuik DG, Bell GJ. Acute response and chronic adaptation to resistance training with and without creatine supplementation in men and women. Canadian Journal of Applied Physiology, 2004.
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. Journal of the International Society of Sports Nutrition, 2017;14:18. PMID: 28615996. https://pubmed.ncbi.nlm.nih.gov/28615996/
Poortmans JR, Francaux M. Adverse effects of creatine supplementation: fact or fiction? Sports Medicine, 2005. (Cited in Kreider 2017 [2] as the basis for the "up to five years of safe daily use" claim.)
NIH Office of Dietary Supplements. Dietary Supplement Fact Sheet: Creatine — for Health Professionals. Updated 2024. https://ods.od.nih.gov/factsheets/Creatine-HealthProfessional/