Yes, creatine can increase the number on the scale, especially in the first week. But that early gain is water held inside your muscles, not fat. Creatine contains no calories and does not make you fat. Over time, any further gain reflects added muscle, if you are training.
Key takeaways
- Early weight gain is water held inside your muscles, not fat.
- Creatine has no calories and does not increase body fat.
- Skip the loading phase and take 3 to 5 grams a day to minimise the water weight.
The early water weight
When you start creatine, particularly with a loading phase, body weight often rises by around one to three kilograms.1 This is water retention. Creatine is stored in muscle along with water, so as your muscles take up more creatine, they also hold more water. Studies tracking body water confirm this rise in the first days of supplementing.1
Importantly, this water goes mostly inside the muscle cells rather than pooling under the skin.1 That is why creatine tends to make muscles look fuller rather than soft. The often-repeated idea of creatine causing a puffy, bloated face is not supported by evidence, since the face has little skeletal muscle to store creatine and its water.
Creatine does not cause fat gain
A standard 5 gram serving of creatine has no calories, so it cannot add body fat on its own.2 Studies that measured body composition found no increase in fat mass with creatine, and a large meta-analysis actually reported slightly greater fat loss in creatine groups compared with placebo.1,2 If your muscles look bigger on creatine, that is fuller, better-hydrated muscle, not fat.
What about longer-term weight gain?
Past the first few weeks, any additional weight gain on creatine usually reflects increased lean muscle mass, and only if you are training. In a 12-week resistance-training study, lean mass and muscle fibre size rose while fat mass stayed the same.1 In other words, creatine helps you build and hold muscle when you put in the work, which is a desirable kind of weight.
How to minimise the water weight
If the early scale jump bothers you, you can skip the loading phase. Taking a steady 3 to 5 grams a day reaches the same muscle saturation over three to four weeks, with the water gain spread out and blunted rather than arriving all at once.1,3 Our Pure Micronised Creatine Sachets come in 5 gram single servings, which makes this steady approach easy to follow.
Does creatine cause more weight gain in women?
Women often see less of a scale change. One controlled trial in women found shifts in body water compartments during creatine loading without a measurable change in body weight.4 Individual responses vary, so the honest answer is that any water weight tends to be modest and, for many women, barely noticeable on the scale.
The bottom line
Creatine can add a little weight early on, and that weight is water inside your muscles, not fat. It has no calories and does not increase body fat. Later gains reflect muscle you build through training. If you would rather avoid the initial water bump, skip loading and take 3 to 5 grams a day. For related questions, see our guides on creatine and bloating and the full picture in creatine side effects and safety.
Related reading
Frequently asked questions
Does creatine make you fat?
No. Creatine has no calories and studies show it does not increase fat mass. Early weight gain is water held in muscle.1,2
How much weight does creatine add?
Typically one to three kilograms of water in the first week, mostly inside the muscle cells.1
Can I avoid the water weight?
Skipping the loading phase and taking 3 to 5 grams a day reduces the initial water gain while reaching the same muscle saturation over a few weeks.1,3
This article is for general information and is not medical advice. If you have a health condition or take medication, speak to your doctor before starting any supplement.
References
- Antonio, J. et al. Common questions and misconceptions about creatine supplementation. Journal of the International Society of Sports Nutrition 18, 13 (2021). JISSN
- Healthline. Does Creatine Make You Fat? (medically reviewed). Healthline
- Kreider, R. B. et al. International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation. Journal of the International Society of Sports Nutrition 14, 18 (2017). JISSN
- Moore, S. R. et al. Fluid Shifts with Creatine Supplementation across the Menstrual Cycle. Nutrients (2023). National Library of Medicine
