Does Creatine Make You Gain Weight? Water vs Fat
Yes, creatine usually makes you gain a little weight, often 1–2 kg (2–4 lb) in the first few weeks. It’s mostly extra water stored inside your muscles, not fat, and over months of training some of it becomes real muscle.
If you’ve just started creatine and the scales have jumped, this is normal. Here’s why it happens, how much to expect, and how to read your weight while you’re taking it. For the basics of what creatine is, start with what does creatine do?
Why does creatine cause weight gain?
Creatine causes weight gain mainly because your muscles hold extra water alongside the extra creatine. Creatine draws water into the muscle cell. When your muscle creatine stores go up, so does the water they carry.
The 2021 ISSN review calls water retention in the early stages the most common side effect of creatine. In one 8-week training study it describes, total body water rose by 7.0% with creatine against 1.7% with placebo, with most of the rise inside the cells.
A second, slower source of weight is muscle. Creatine helps you do a bit more work in each session, and over months that can mean a little more lean mass (see below).
How much weight will you gain on creatine?
Expect roughly 1–3 kg (2–7 lb) after a loading phase, and usually a smaller, slower rise without one. The numbers vary a lot from person to person.
| Situation | Typical change | Source |
|---|---|---|
| Loading week (about 20 g a day) | 1–3 kg (2–7 lb) of body mass, mostly water | Antonio 2021 |
| Fluid retained during loading | About 0.5–1.0 litres | Kreider 2017 |
| Average across 143 trials | About 0.9 kg (1.9 lb) more body mass than placebo | Pashayee-Khamene 2024 |
| Months of creatine plus lifting | About 1.1 kg (2.4 lb) more lean mass than lifting alone | Delpino 2022 |
Loading speeds it up. A big dose fills your muscles in about a week, so the water arrives quickly. At the standard 3–5 g a day, stores fill more gradually over about 4 weeks, so the change on the scales is usually more gradual too. The creatine calculator shows both options for your weight.
Is it water or muscle? How to tell
The speed of the change is the best clue. Water arrives fast; muscle arrives slowly.
- A jump within days of starting, especially during a loading week, is almost all water. Muscle can’t be built that quickly.
- A slow rise over months, alongside your lifts going up, is more likely to include some real muscle. In the 2022 meta-analysis, the extra lean mass only showed up when people combined creatine with resistance training; with no exercise there was no meaningful effect.
- A steady rise with no change in strength is more likely to be your diet. Check your calories.
Lean mass measured by scans also includes water held in muscle, so even “lean mass” gains in studies are partly water. That’s one reason the numbers vary so much between studies.
Does creatine make you fat?
No, creatine doesn’t add fat. The research doesn’t show it raising fat mass.
- The 2021 ISSN review concludes that creatine does not increase fat mass across a variety of populations.
- In adults under 50 who lifted weights, a 2023 meta-analysis found creatine made no difference to absolute fat mass, and a very small drop in body-fat percentage.
- A 2024 meta-analysis of 143 trials found creatine slightly increased body mass and fat-free mass and slightly reduced body-fat percentage, with bigger effects when people also did resistance training.
So if the scales go up, that’s water and, over time, muscle. If your weight keeps climbing for months, look at your overall calories rather than at your creatine.
Will creatine make me look bloated?
Probably not in the way people fear. The water creatine pulls in is stored mainly inside the muscle, not under the skin. A 2003 study in 32 men and women who lifted found creatine raised body mass and total body water but didn’t change how that water was distributed between the inside and outside of cells.
What some people do notice is a full stomach or mild discomfort during loading, when they’re taking large single doses. Skipping the loading phase, or splitting the dose through the day, usually avoids it.
Is the weight gain different for women?
The same dose applies, and women may see less change in lean mass. In the 2022 lean-mass meta-analysis, men on creatine gained about 1.46 kg (3.2 lb) of lean mass, while the smaller increase in women (0.29 kg, 0.6 lb) wasn’t statistically significant. That’s an average across studies, so it doesn’t predict what you’ll see. The 3–5 g daily dose is the same for women and men.
Can you take creatine while cutting?
Yes, you can take creatine while losing fat; just expect the water to mask some fat loss on the scales at first. A 1–2 kg jump in week one can look like your diet has stopped working when it hasn’t.
A few ways to read your weight sensibly:
- Start creatine before you start your cut, or at least note the day you started, so you know where the jump came from.
- Watch the weekly trend, not single weigh-ins. Water swings from day to day.
- Use other measures too: a tape measure round your waist, photos, and your strength in the gym.
If you’re setting a deficit, our calorie deficit calculator and the guide to how a calorie deficit works explain how to pick a sensible target. Don’t go below about 1,200 kcal a day (women) or 1,500 kcal a day (men) without medical supervision. If you’re worried about your eating or your relationship with your weight, Beat offers confidential support.
Get Gains logs your body weight and charts the trend over time, alongside your supplement reminders, so a creatine-week jump sits in context instead of looking like a setback.
Should you stop creatine if you gain weight?
Only if the weight genuinely bothers you more than the benefits help you. For most people who lift, a small amount of water held in the muscle is a fair trade for a little more strength and muscle. If you compete in a weight-class sport, plan around it, for example by skipping the loading phase and starting well before a weigh-in.
If you have kidney disease, take medication, are pregnant, breastfeeding or under 18, speak to a GP or pharmacist before taking creatine. This is general information, not medical advice (see our terms).
Related questions
- Does creatine cause hair loss? The evidence doesn’t support it. See does creatine cause hair loss?
- Does creatine HCl cause less water retention? It’s often marketed that way, but we found no trials showing it. See creatine HCl vs monohydrate.
How we wrote this: drafted with AI assistance, then fact-checked against the sources below and edited by Alex Lawrence. Read our editorial policy.
Sources
- Antonio J et al. (2021). Common questions and misconceptions about creatine supplementation: what does the scientific evidence really show? J Int Soc Sports Nutr 18:13
- Kreider RB et al. (2017). International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine. J Int Soc Sports Nutr 14:18
- Powers ME et al. (2003). Creatine supplementation increases total body water without altering fluid distribution. J Athl Train 38(1):44-50
- Pashayee-Khamene F et al. (2024). Creatine supplementation protocols with or without training interventions on body composition: a GRADE-assessed systematic review and dose-response meta-analysis. J Int Soc Sports Nutr 21(1):2380058
- Delpino FM et al. (2022). Influence of age, sex, and type of exercise on the efficacy of creatine supplementation on lean body mass: a systematic review and meta-analysis of randomized clinical trials. Nutrition 103-104:111791
- Candow DG et al. (2023). Resistance exercise and creatine supplementation on fat mass in adults < 50 years of age: a systematic review and meta-analysis. Nutrients 15(20):4343