Reviewed and updated: 22 October 2026
If you gained weight after taking creatine, the honest answer is that it is almost certainly water held inside your muscles, not fat. Most people see the scales rise by around 1 to 2 kg in the first week or two, and the jump is biggest for anyone who starts with a high-dose loading phase.
I get asked this one a lot, usually by someone who has just started creatine, stepped on the scales on day five and wondered what on earth they have done. So let me walk you through what is actually happening, why a full ten pounds is unusual, and how to keep the early bump small if it bothers you.
Why you gained weight after taking creatine: the quick answer
- What it is: extra water drawn into your muscle cells as they store more creatine.
- How much is typical: roughly 1 to 2 kg (about 2 to 4 pounds), mostly in the first one to two weeks.
- Is it fat? No. Creatine carries essentially no calories, so it cannot add body fat on its own.
- Does it keep climbing? No. Once your muscles are full, your weight settles at a new, steady level.
- Want a smaller bump? Skip loading and take a steady daily serving of around 3 to 5 g instead.
My usual morning: oats, a big glass of water and my creatine stirred in. Nothing dramatic, just consistent. Illustrative image
What creatine actually does inside a muscle
Creatine is something your body already makes and stores, mostly in skeletal muscle, where it sits as phosphocreatine. Think of it as a small, very fast energy reserve your muscles draw on for short, hard efforts like a heavy set or a sprint. Meat and fish provide some creatine in the diet, and supplementing simply tops those stores up further.
Here is the part that explains the scales. Creatine is osmotically active, which is a technical way of saying that water follows it. As your muscle cells take up more creatine, they pull extra water in alongside it to keep things balanced. Nothing is going wrong; the muscle is just holding a little more fluid than before.
Is it really 10 pounds? What the numbers usually look like
Ten pounds is about 4.5 kg, and that sits well above what most people see. In the research, the typical early increase in body mass during creatine loading is closer to 1 to 2 kg. If your scales have moved by a full ten pounds, creatine is probably only part of the story. A few other things tend to pile on top:
- the carbohydrate and salt you might be taking it with, both of which also hold water;
- normal day-to-day swings in hydration, which can easily be a kilo or more;
- food still in your gut, and the time of day you weigh yourself;
- real changes from your training and eating over the same few weeks.
Not everyone responds the same way either. If you already eat plenty of red meat and fish, your muscle stores may start fairly full and you might notice very little change. Vegetarians and vegans, who get almost no creatine from food, often see a bigger initial shift simply because there was more room to fill.
What the research shows about creatine and body water
The clearest study on this exact question came from Powers and colleagues in 2003. Men and women followed a loading protocol of 25 g a day for a week, then 5 g a day, for 28 days, and their total body water was measured directly rather than estimated. The creatine group showed rises in muscle creatine, body mass and total body water together, and the balance between fluid inside and outside the cells did not change. In plain terms, the extra weight was water, stored in a normal way.
More recent work points the same way. Buck and colleagues reported in 2023 that a week of creatine raised total body water by around 2 percent, which bioimpedance scales then counted as extra "fat-free mass". Ribeiro and colleagues found that intracellular water rose alongside resistance training in their creatine group. And the International Society of Sports Nutrition's position stand describes early weight gain as one of the most consistently reported effects of supplementation, while noting that creatine is one of the most researched supplements available.
Our pick for this guide
Want the steady, no-loading route?
3.5g of micronised creatine monohydrate per level teaspoon, one ingredient, unflavoured. Creatine increases physical performance in successive bursts of short-term, high intensity exercise; the beneficial effect is obtained with a daily intake of 3g. A food supplement, not a replacement for medical advice.
From £10.07 · 400g pouch, about 114 servings
Shop Micronised Creatine →Where the water actually goes
This detail matters for how the change looks. Because the water is drawn into the muscle cell rather than sitting under the skin, many people find their muscles look a touch fuller rather than puffy. A minority do notice a softer look in the first couple of weeks, which is individual and usually settles once stores stabilise.
Water weight is not fat, and why the difference matters
Gaining fat means taking in more energy than you use over time. Creatine adds essentially no calories, so it cannot do that by itself. The trouble is that the scales cannot tell a kilo of water from a kilo of fat, which is exactly why the first week is so misleading.
My suggestion is to judge progress across several weeks instead: how your clothes fit, a simple tape measurement around the waist, and how you look and feel in training. Think of the first jump as a one-off adjustment and watch the trend, not the spike. And if what you really want is a flatter stomach, it is worth reading why creatine does not burn belly fat either, because that work comes from your overall diet, activity and consistency.
Plenty of water, a banana and some oats. The boring basics do most of the work. Illustrative image
How to reduce or avoid the early water weight
Skip the loading phase
The fast scale jump is driven mainly by loading, which usually means 20 to 25 g a day split into several doses for five to seven days. You do not have to load. A steady 3 to 5 g a day reaches the same muscle saturation in roughly three to four weeks, so the water arrives gradually and the scales move less, and less suddenly. Our micronised creatine monohydrate gives 3.5 g per level teaspoon, which is a simple way to take a steady daily amount. The detail is in our guide to creatine loading, dosing and saturation.
Keep the rest of your routine steady
If you change your training, your carbohydrate intake and start creatine all in the same week, you will never know which one moved the scales. Change one thing at a time where you can, weigh yourself at the same time of day, and look at a weekly average rather than single readings.
Give it a few weeks
The initial water shift is a single adjustment as your muscles top up. Once they are saturated, body weight tends to settle at the new level and stops climbing. It is a new baseline, not an ongoing trend.
What happens if you stop taking creatine?
If you stop, the extra water your muscles were holding leaves gradually over a few weeks as muscle creatine drifts back to its natural level, and the scales usually come back down by a similar amount. There is nothing harmful about this. For the everyday practicalities of when and how to take it, see our notes on creatine timing and usage.
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Why we chose creatine for our range
Creatine is one of the few supplements with an authorised claim in the UK: creatine increases physical performance in successive bursts of short-term, high intensity exercise, with the effect obtained from a daily intake of 3 g. That is why we keep ours simple. It is 100% micronised creatine monohydrate, a single ingredient milled fine so it mixes cleanly, with no fillers, flavourings or sweeteners. It is formulated in the UK and tested for purity and heavy metals at our GMP-certified facility. If you want the bigger picture first, our pillar guide on what creatine is and how it works is the place to start, and our supplement guides hub collects everything else.
An honest note on the evidence
The water explanation is well supported, but a few caveats are fair. Most body-water studies are short and small. Some rely on bioimpedance, which estimates water rather than measuring it precisely. Responses vary, so your experience may sit above or below the averages. And because water counts as fat-free mass, a scan showing more "lean mass" in week one is partly fluid, not new muscle. If you have come across alarming claims online, our look at common creatine myths puts them in context.
A few cautions worth knowing
Creatine monohydrate is generally well tolerated by healthy adults. Large single doses can upset some stomachs, another reason a single daily serving suits most people better than loading. Keep drinking as you normally would. If you have kidney disease or any other medical condition, are pregnant or breastfeeding, or take regular medication, speak to your GP or pharmacist before starting.
Frequently asked questions
How much weight do you gain on creatine?
Most people gain around 1 to 2 kg, roughly 2 to 4 pounds, in the first one to two weeks, mainly from extra water stored in muscle. The gain is usually larger with a loading phase and smaller with a steady daily serving.
Is creatine weight gain water or fat?
It is water. Creatine draws water into muscle cells as they store more of it, and creatine provides essentially no calories, so it cannot add body fat on its own.
Will the weight go away if I stop creatine?
Usually yes. Over a few weeks the extra water leaves as muscle creatine returns to its natural level, and the scales tend to fall by a similar amount.
How do I avoid water weight on creatine?
Skip the loading phase and take a steady 3 to 5 g a day. Your muscles still fill up, over about three to four weeks, so the water arrives gradually and the scales move less.
Does creatine make you look bloated?
Most of the water goes inside the muscle cell, so many people look slightly fuller rather than puffy. A few notice a softer look for the first couple of weeks, which usually settles.
Our pick for this guide
Ready to keep it simple with one daily serving?
3.5g of micronised creatine monohydrate per level teaspoon, one ingredient, unflavoured. Creatine increases physical performance in successive bursts of short-term, high intensity exercise; the beneficial effect is obtained with a daily intake of 3g. A food supplement, not a replacement for medical advice.
From £10.07 · 400g pouch, about 114 servings
Shop Micronised Creatine →Sources
- Powers and colleagues, 2003, creatine supplementation increases total body water without altering fluid distribution, PMC155510
- Kreider and colleagues, 2017, International Society of Sports Nutrition position stand on creatine, PMC5469049 (DOI 10.1186/s12970-017-0173-z)
- Buck and colleagues, 2023, body composition by multi-frequency bioimpedance after creatine supplementation, PubMed 37675500
- Ribeiro and colleagues, 2020, creatine and the ratio between intracellular water and skeletal muscle mass, PubMed 32916658
You can find more of our guides on the Pure Vitamins UK home page.
Warmly,
Dr. Miron, Founder of Pure Vitamins UK
This article is for general information and education. Food supplements are not a substitute for a varied, balanced diet and a healthy lifestyle, and this is not medical advice. If you have symptoms or a health condition, speak to your GP or pharmacist.
