Key takeaways
- Creatine draws water into your muscles, so the scales may go up by around 1 to 2kg in the first weeks.
- That's not the same as puffy, under-the-skin bloating or fat gain.
- Stomach bloating is more likely with large loading doses (around 20g a day).
- A steady 3 to 5g a day with plenty of water avoids most problems.
In this guide
Why creatine adds water weight
Creatine is stored in your muscles. As muscle creatine levels rise, muscles also hold a little more water, which is a normal part of how creatine is stored.
That's why many people see the scales go up slightly in the first weeks. It's not fat, and it usually levels off.
Muscle water vs bloating: not the same thing
| Water in muscle | Stomach bloating | |
|---|---|---|
| What it is | Extra water stored inside muscle cells | Gassy, full or uncomfortable tummy |
| Looks like | Fuller-looking muscles; small rise on the scales | A swollen tummy |
| Usual cause | Creatine being stored normally | Large doses at once, or not enough water |
| Fix | Nothing needed; it levels off | Smaller doses, with water and food |
For puffiness that's not linked to creatine, such as before a period or after salty food, see our water retention guide.
Why loading makes it worse
A “loading phase” means taking about 20g a day, split into four doses, for 5 to 7 days. It fills your muscles faster, but it's also when stomach upset and bloating are most likely.
You don't have to load. Taking 3 to 5g a day reaches the same muscle levels within about three to four weeks, with fewer side effects. The UK authorised claim is based on 3g of creatine a day. Our creatine loading guide compares both approaches.
How to avoid stomach bloating
- Skip the loading phase and take 3 to 5g a day
- Mix it with enough liquid, at least 150 to 250ml per serving
- Take it with a meal if you have a sensitive stomach
- Drink water through the day
- Choose pure creatine monohydrate, without added sugars or sweeteners that can upset some people
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Questions people ask
How much weight will I gain on creatine?
Many people see around 1 to 2kg in the first few weeks, mostly water in the muscles. It varies from person to person.
Does creatine make your face puffy?
Creatine's extra water is stored in muscle. If your face or ankles are puffy, look at other causes such as salt, heat or your cycle.
Will the water weight go away if I stop?
Yes. Muscle creatine levels gradually fall over a few weeks after stopping, along with the extra water.
Is creatine bad for your stomach?
Most people tolerate 3 to 5g a day well. Stomach upset is more likely with large single doses.
Should I drink more water on creatine?
Drink normally and enough that your urine is pale yellow. Mix each serving with plenty of liquid.
Sources: Antonio et al. 2021, JISSN · GB NHC register (creatine claim)
This article is general information, not medical advice. Food supplements should not replace a varied, balanced diet and healthy lifestyle.
