Does Creatine Make You Gain Weight?

Yes. Expect the scale to climb 1 to 2 kg in the first few weeks. That increase is intracellular water following creatine into muscle cells.

What creatine actually does inside your muscle cells

Your muscles store creatine to regenerate ATP, the molecule that powers short, intense efforts like a heavy squat or a sprint. Most people's creatine stores sit at only 60 to 80 percent capacity. Supplementation fills the gap.

When creatine enters a muscle cell, water follows. This is an osmotic process. The water stays inside the muscle, not under the skin, which is why muscles tend to look fuller rather than softer or puffy. More creatine in the cell means more available phosphocreatine, which means more ATP turnover during training, which means heavier loads and more reps before fatigue.

At full saturation, that intracellular water accounts for the 1 to 2 kg of scale weight most users see in the first few weeks.

Does creatine cause fat gain?

No. A PubMed-indexed RCT measured body composition changes in subjects taking creatine. Total body weight rose from 90.42 kg to 92.12 kg. Body water content rose from 53.77 L to 57.15 L. Percent body fat did not change, and neither did daily caloric intake. The weight gain was attributable to water retention.

A standard 5-gram serving of creatine monohydrate contains zero calories. Fat gain requires a sustained calorie surplus. Creatine does not create one.

The loading phase makes water retention more noticeable (and it is optional)

A loading phase involves taking 20 to 25 grams per day for 5 to 7 days, split across multiple servings. The goal is rapid muscle saturation. The trade-off is more acute water retention: during loading, muscles can temporarily hold up to 1 litre of extra water, according to the International Society of Sport Nutrition.

You do not have to load. At 3 to 5 grams per day, you eventually reach the same saturation as someone who loaded, without the early spike on the scale.

For hardgainers who are already watching the scale closely, skipping the loading phase removes one source of confusion. You can read more about structuring a surplus in our lean bulk diet guide.

Creatine and resistance training: the long-term picture

When creatine is combined with strength training, it increases exercise capacity and builds additional muscle mass. In the RCT cited above, the creatine group's total body weight rose by 1.7 kg (90.42 to 92.12 kg) while body water increased by 3.38 L (53.77 to 57.15 L) and percent body fat stayed flat. The scale moved, but the composition behind it did not shift toward fat.

If you are tracking macros during a lean bulk, or following a hardgainer programme, measuring waist circumference or taking progress photos alongside scale weight gives a clearer read on what is actually changing.

Creatine alone will not make you lose fat at all. Taking it while doing weight training increases lean body mass, and that increased lean mass is what ultimately decreases fat.

How to reduce water retention if it bothers you

If the initial scale jump interferes with how you track progress, four evidence-backed tactics help:

1. 1
   Drink more water. Adequate hydration stimulates urination, which helps remove excess water from your body.
2. 2
   Skip the loading phase. Start at 3 to 5 grams per day instead.
3. 3
   Limit sodium. Excess sodium contributes to fluid retention independently of creatine. Aim for less than 1,500 mg per day, with a maximum of 2,300 mg.
4. 4
   Watch excess carbohydrate intake. Carbs are stored as glycogen, and glycogen also binds water. Stacking high-carb meals on top of creatine loading amplifies the water weight.

None of these require you to reduce your creatine dose.

Which type of creatine to take

Creatine monohydrate has the most trial data behind it. Other variants (creatine HCL, ethyl ester, buffered creatine) do not have equivalent studies. The ISSN recommends 3 to 5 grams per day, or 0.1 g per kilogram of body mass, noting that creatine supplementation is relatively well tolerated at these dosages. A tub of monohydrate powder is also cheaper per serving than most alternatives.

Who should (and shouldn't) take creatine

The ISSN's position paper reviewed the evidence and concluded that creatine supplementation at 3 to 5 g/day is relatively well tolerated. It is safe and effective for women. If you have a pre-existing kidney condition or any other health concern, talk to your doctor before starting any supplement.

If you are tracking macros alongside creatine, knowing how much protein you need will have a larger effect on your results than any supplement choice.