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Does Creatine Supplementation Make You Gain Weight?
Madhura Mohan
Yes — creatine does cause weight gain. But before you put the tub down, understand what kind of weight you’re gaining. It’s not fat. It’s not subcutaneous fluid. It’s intramuscular water — water drawn into your muscle cells as phosphocreatine concentrations rise. And that’s actually a very good thing.
Why Creatine Causes Weight Gain
Creatine works by increasing the concentration of phosphocreatine (PCr) in your muscles. PCr is a hydrophilic molecule — it attracts and binds water. As your muscles become saturated with creatine, they retain more water inside the muscle cells (intracellularly). This increases total body water weight without any change to body fat.
Expect 0.5–1.5kg of weight gain in the first 1–2 weeks of maintenance dosing (3–5g/day). During a loading phase (20g/day for 5–7 days), the gain may reach 1–2kg as saturation happens faster.
📖 Rawson & Volek (2003). Effects of creatine supplementation and resistance training on muscle strength. J Strength Cond Res. pubmed.ncbi.nlm.nih.gov/23919405 →
3 Myths About Creatine Weight Gain
Creatine causes fat gain
Creatine has zero caloric content. It cannot cause fat gain. All weight gained from creatine is intramuscular water — a different compartment entirely from subcutaneous fat storage.
The weight gain makes you look bloated and soft
Intramuscular water makes muscles look fuller and harder, not puffy. Subcutaneous water retention (the bloated look) is not supported by clinical evidence at normal 3–5g daily doses.
You should avoid creatine if you want to stay lean
Lean athletes across all weight-class sports use creatine. The functional weight gain (intramuscular water) supports performance without increasing body fat or changing body composition negatively.
📖 Stares A, Bains M. (2021). The Continuing Importance of Creatine Supplementation for Physical Performance. Nutrients/PMC. pmc.ncbi.nlm.nih.gov/PMC8401986 →
Is the Weight Gain Permanent?
The intramuscular water weight is tied to creatine saturation. If you stop taking creatine, muscle PCr levels return to baseline over 4–6 weeks and the water weight is lost. However, lean muscle gained from better training performance during creatine use is permanent — the muscle tissue built from harder, more productive sessions stays with you.
Frequently Asked Questions
“Creatine weight gain is muscle fullness, not fat. Embrace it — your muscles are becoming more powerful, not just heavier.”
1–2kg of intramuscular water in week one. Fuller, harder muscles. Better performance. That’s not a side effect — that’s the mechanism working.
📚 References
- Rawson ES, Volek JS. (2003). Creatine supplementation and resistance training. J Strength Cond Res. pubmed.ncbi.nlm.nih.gov/23919405
- Stares A, Bains M. (2021). Creatine Supplementation for Physical Performance. Nutrients/PMC. pmc.ncbi.nlm.nih.gov/PMC8401986
- Buford TW, et al. (2007). ISSN creatine position stand. J Int Soc Sports Nutr/PMC. pmc.ncbi.nlm.nih.gov/PMC2048496