Does creatine cause water retention and how much weight can it help you gain?

Yes, creatine can increase water retention, especially in the first few days after starting supplementation or during the loading phase. However, this isn't exactly the same "fluid retention" commonly thought of as swelling in the face, ankles, or water under the skin. Creatine is osmotically active, and when stored in muscle cells, it increases the water content associated with them; therefore, early weight gain often reflects changes in muscle hydration rather than an increase in fat mass. [1]

This effect is most noticeable during loading—approximately 20 grams of creatine per day for several days. Recent reviews describe a weight gain of approximately 1-3 kg with this regimen, with a significant portion of the early gain being water weight. With a typical intake of 3-5 grams per day without loading, muscle saturation occurs more slowly, so weight changes typically develop more gradually and may be significantly less noticeable. [2]

However, scientific data does not support the simple formula "creatine constantly floods you with water." Some studies have shown increases in total body water or intracellular water, while others have found no significant changes in water compartments after several weeks of use. Therefore, it is more accurate to say that a short-term increase in water is indeed possible, especially at the beginning of use, but its magnitude and persistence during long-term use vary between individuals. [3]

How creatine retains water

Creatine enters muscle cells via a special transporter and accumulates there in both free and phosphocreatine form. Phosphocreatine is involved in the rapid regeneration of adenosine triphosphate, the immediate energy source for intense muscle contraction.

At the same time, creatine is an osmotically active substance. If its concentration inside the cell increases, water is displaced to maintain normal osmolarity. This mechanism underlies the early increase in muscle tissue hydration. [4]

Creatine transport itself is linked to sodium ions, but this does not mean the supplement acts like excess table salt and causes the body to abnormally retain sodium. A review by the International Society of Sports Nutrition emphasizes that creatine-induced fluid changes cannot be attributed to simple sodium retention. [5]

This distinction is fundamentally important. Water within a muscle cell and tissue swelling are physiologically distinct conditions.

Where exactly is water retained - in the muscles or under the skin?

The most plausible and frequently observed effect of creatine is related to intracellular water, especially during the first days of supplementation. However, studies of water compartments have yielded inconsistent results: some have also recorded changes in extracellular water, while others have found an increase in total water without changing the ratio between the intracellular and extracellular compartments. [6]

In one randomized study, 32 trained men and women used 25 g of creatine per day for a week, followed by 5 g for another three weeks. The creatine group increased body weight and total body water, but the distribution of fluid between the intracellular and extracellular compartments did not change significantly.[7]

In another study, a seven-day loading program in young soccer players increased total water, measured by the deuterium dilution method, by approximately 2.3 liters, while body weight increased by approximately 1 kg. This again demonstrates that water balance does change after loading, but the number on the scale does not necessarily fully reflect the change in total water. [8]

More recent data also show that the effect is not universal. In a study of women who regularly exercised, different creatine monohydrate supplementation regimens for 14 days failed to produce significant increases in total, intracellular, or extracellular water in most comparisons. [9]

Therefore, the statement "creatine always draws all water into the muscles" somewhat oversimplifies reality. However, it is equally incorrect to claim that it necessarily causes fluid accumulation under the skin and pronounced swelling.

Does creatine cause facial swelling?

Severe facial swelling is not a typical or well-documented reaction to routine creatine supplementation.

Studies that directly measured fluid compartments have not found a consistent redistribution of water into the extracellular space, which would explain the characteristic "edematous" appearance of the face. The early water-releasing effect of creatine is primarily associated with changes in total and intracellular water. [10]

A person may indeed subjectively notice that their face appears slightly fuller after rapid weight gain. However, it's impossible to determine whether this is due to creatine based on visual impression alone. Changes in salt and carbohydrate intake, alcohol, lack of sleep, hormonal fluctuations, and normal daily changes in water balance can have a greater impact on appearance.

If actual edema occurs—noticeable swelling of the ankles or shins, skin that remains dimpled for a while after pressure, swelling of the hands or abdomen—this should no longer be automatically attributed to "normal water from creatine." These symptoms correspond to the medical definition of edema and have many possible causes. [11]

Does creatine make muscles look fuller?

Yes, some people experience slightly fuller muscles even early on in their intake.

If the water content inside muscle cells increases, the tissue volume increases slightly. This can make the muscles appear fuller even before the training program has had time to create significant amounts of new muscle protein. [12]

This effect is especially noticeable during the loading phase because muscle creatine stores and associated water increase rapidly.

With the usual 3-5 grams per day, the changes develop much more slowly. Some people hardly notice any difference in their appearance.

With long-term strength training, the situation becomes more complicated: an increase in lean mass can simultaneously reflect both water and an actual increase in muscle tissue.

How much water does creatine retain?

There's no single, universal number. Results depend on the dose, loading phase, initial creatine stores, body weight, diet, training, and the method of measuring water intake.

High-dose loading produces the most noticeable effect. A 2025 safety review indicates that 20 g of creatine per day for five days can result in a weight gain of approximately 1-3 kg, primarily due to an increase in total body water. [13]

However, this cannot be interpreted as a rule:

20 g of creatine = exactly 2 kg of water.

For example, in a study of soccer players, after seven days of loading, total water increased by approximately 2.3 L, but body weight only increased by approximately 1 kg.[14]

In a study of young men and women, after one week of loading with 0.3 g/kg, total water as measured by bioimpedance analysis increased by approximately 2%, while body composition machines showed an increase in lean mass.[15]

If a person starts with the standard 3-5g, the change is usually less dramatic. This is why loading is not necessary for those concerned about rapid weight gain. [16]

What to expect on the scale

Mode	What happens more often?
20 g/day for about 5-7 days	Faster satiety and most noticeable early gains in water and weight
3-5 g/day without loading	Slower satiety, weight change usually develops gradually
Several weeks of admission	Water reaction becomes less predictable; some studies show no further increase in water
Creatine + strength training for months	Lean mass gains can include both water and actual muscle adaptations.

[17]

Does a gain of 1-2 kg mean that a person has gained fat?

No. You can't quickly gain 1-2 kg of fat simply by starting creatine supplementation unless you have a corresponding energy surplus in your diet.

Creatine does not contain a significant amount of energy capable of independently causing such an increase in fat mass. The early weight gain is much better explained by water. [18]

A large 2024 systematic review and meta-analysis of 143 studies found that, on average, creatine increased body weight by approximately 0.86 kg and estimated lean mass by approximately 0.82 kg. Fat percentage decreased slightly rather than increased.[19]

A more recent meta-analysis of studies of creatine plus resistance training also found increases in total and lean mass without a significant increase in fat mass.[20]

Therefore, if your weight increases shortly after starting creatine, this is not a reason to conclude that the supplement is “interfering with fat burning.”

Why scales and body composition analysis can be misleading

This is one of the most underrated effects of creatine.

Many methods for assessing "muscle" or lean mass actually count water as part of lean tissue. Therefore, an increase in water after starting supplementation may be registered as an increase in lean mass, even though a person physiologically could not have built a kilogram of new contractile muscle protein within a few days.

In a 2023 study, participants took a loading dose of creatine for a week. Total body water increased by approximately 0.8 kg, and various body composition assessment methods reported increases in fat-free mass of approximately 1.1 to 1.9 kg. The authors concluded that the changes in body water were detected by the devices as an increase in fat-free mass. [21]

A similar effect has previously been shown in studies using dual-energy X-ray absorptiometry: changes in the content of muscle creatine, glycogen, and associated water can change the estimated “lean mass” even over a period when a significant increase in muscle protein cannot be expected. [22]

This is especially important when using:

• home smart scales;
• InBody and other bioimpedance systems;
• dual-energy X-ray absorptiometry to monitor small, short-term changes.

If a person started creatine a week ago and the machine shows "+1 kg of muscle," it's more accurate to assume that some or a significant portion of the early change may be water, not new muscle protein.

Can creatine ruin a "dry" appearance?

Most people do not have a proven significant accumulation of subcutaneous water that would make the body appear permanently "fuzzy."

On the contrary, intramuscular hydration does visually increase muscle volume in some people. However, aesthetic assessment is subjective, and studies are not designed to measure the "dryness" of one's appearance in the mirror.

For a bodybuilder immediately before a competition or a weight-class athlete, even 0.5-1 kg of additional weight can make a difference, regardless of the water content. Therefore, the athletic goal is distinct from the medical issue of safety.

If a stable number on the scale or a specific weight category is important, it is wiser to avoid sudden loading and use a gradual scheme, if creatine is needed at all during this period.

Is it possible to avoid water retention?

It's impossible to completely guarantee a lack of water retention because the osmotic effect is linked to the accumulation of creatine in the muscles. However, a sudden jump in muscle mass can be made less likely by avoiding the loading phase.

Standard small daily doses of around 3-5g are effective and will gradually increase muscle stores; there is no mandatory loading requirement.[23]

Instead of:

20 g daily x 5-7 days

You can immediately use the standard maintenance regimen. Saturation will occur more slowly, but rapid water loss and sudden weight changes are less likely.

There's no reason to try to "drain" water with diuretics, drastically reduce fluid intake, or completely eliminate salt just because of creatine. Such methods can create a much greater problem with water and electrolyte balance than the supplement itself.

Should I drink more water while taking creatine?

There is no specific proven formula like “add another liter of water for every 5 grams of creatine.”

A common theory held that creatine supposedly shifts water into muscle, leaving other tissues dehydrated. However, controlled studies do not support this.

A systematic review of studies in athletes, including those performing exercise in hot conditions, found no deterioration in hydration status or heat dissipation with recommended creatine doses.[24]

In a randomized trial of dehydrated trained men, short-term creatine supplementation also did not impair hydration or thermoregulation during prolonged exercise in the heat.[25]

Therefore, a person should adequately replenish fluids according to thirst, physical activity, climate, and individual medical recommendations. There is no need to force-drink excessive amounts of water just because of creatine.

Can creatine actually cause dehydration?

Controlled trial data do not support this.

The theoretical concern arose from the assumption that water would move into the muscles and reduce available extracellular volume. However, experimental studies have not confirmed an increased risk of dehydration, overheating, or muscle cramps with standard use. [26]

In a review by the International Society of Sports Nutrition, the authors concluded that the available evidence does not support the claim that creatine causes dehydration or muscle cramps.[27]

Therefore, the combination of statements:

Creatine retains water
, which means it simultaneously dehydrates the body.

At first glance it seems logical, but it is not confirmed physiologically or experimentally.

Does water weight disappear over time?

There are two different scenarios here.

With continued use, the early weight gain typically stabilizes after tissue saturation. This doesn't mean that all the water associated with increased creatine stores necessarily disappears; rather, the body reaches a new equilibrium.

Long-term studies yield inconsistent results. Several studies found no significant difference in total, intracellular, or extracellular water after 5-10 weeks, while other studies continued to show higher total or intracellular water. [28]

After cessation of creatine supplementation, elevated muscle stores gradually return to baseline levels, typically over several weeks. Accordingly, the associated excess water weight should also decrease gradually, rather than disappearing overnight. A position paper from the International Society of Sports Nutrition indicates that it typically takes approximately 4-6 weeks for elevated muscle creatine stores to return to baseline levels. [29]

A person may see weight loss sooner, but the exact time frame varies from person to person.

What happens during the loading phase?

It is loading that has created much of creatine's reputation as a "water-drenching" substance.

The classic loading regimen is approximately 20 g per day for 5-7 days, usually divided into several doses. This dose quickly increases muscle creatine stores. [30]

At the same time, the water bound to these tissues rapidly increases. A 2025 review estimates the early weight gain during such a regimen to be approximately 1–3 kg, primarily due to total water. [31]

However, the download is only needed for speed.

Taking approximately 3 g daily can also gradually increase muscle phosphocreatine to comparable levels if given enough time. This principle is known from classic dosing studies and remains valid. [32]

Therefore, a person who is most concerned about weight change or appearance may simply not use the loading phase.

Do men and women react the same way?

There is no reason to believe that significant water retention is necessary in either sex.

Much of the early research was indeed conducted among men, limiting the ability to generalize the findings to women.

However, there are studies that include both sexes. In a study by Powers et al., 16 men and 16 women participated; creatine increased mass and total water, but did not change the distribution of fluid between the major compartments. [33]

A more recent study of athletic women found no significant changes in total, intracellular, or extracellular water after 14 days of multiple supplementation regimens.[34]

Therefore, it is impossible to promise a woman that “there will definitely be no water retention,” but there is also no reason to consider pronounced swelling a specific female side effect of creatine.

Why does one person gain a kilogram of water, while another hardly notices anything?

The response to creatine varies considerably.

Initial muscle stores vary depending on diet, muscle mass, and individual physiology. Someone with relatively low initial stores can increase muscle creatine levels more than someone who is already closer to their natural saturation point.

They also differ:

• the dose used;
• presence of a loading phase;
• muscle tissue mass;
• workout;
• amount of carbohydrates and glycogen;
• normal salt intake;
• phase of the menstrual cycle;
• time of day and conditions of weight measurement.

Therefore, comparing your own scale with the phrase from the internet “creatine should add exactly 2 kg” is incorrect.

At the level of a large set of studies, the average weight gain is relatively small: a meta-analysis of 143 studies found about 0.86 kg, but the individual range around the mean is inevitably wider.[35]

Does creatine affect weight loss?

A small increase in water weight may mask a decrease in fat mass on a regular scale, but it does not mean that weight loss has stopped.

Let's imagine that someone lost 0.8 kg of fat in two weeks, but simultaneously started taking creatine and retained about 0.8 kg of additional water. The scale might remain virtually unchanged, even though body composition has improved.

This is why the first weeks after starting creatine are inconvenient for evaluating a weight loss program solely based on total body weight.

A 2024 meta-analysis found no increase in fat mass due to creatine; instead, average fat percentage decreased slightly, especially when supplementation was combined with exercise training.[36]

Therefore, when losing weight, it is more useful to look at waist dynamics, photos taken under similar conditions, training indicators, and long-term weight trends simultaneously, rather than at a separate morning weigh-in.

How to properly track your weight after starting creatine

The first few days after changing supplementation are a poor time to compare body composition.

If the goal is to assess fat loss, it is more useful to compare average weight over several days rather than two separate measurements.

If InBody or another bioimpedance device is used, measurements should be taken under as similar conditions as possible: at approximately the same time of day, with comparable hydration, nutrition, and physical activity.

This is especially important with creatine, as a 2023 study showed that increasing total water can directly increase estimated lean mass on bioimpedance and even dual-energy X-ray absorptiometry.[37]

Therefore, the early phrase of the device:

"+1.5 kg of muscle"

It may sound more pleasant than actual physiology allows.

Can I take a diuretic to remove water from creatine?

There is no rational reason to use a diuretic simply for the normal intramuscular water-storing effect of creatine.

Diuretics primarily affect renal sodium and water regulation and can disrupt electrolyte balance, blood pressure, and hydration. They are not a tool for selectively removing water from muscles after creatine supplementation.

If additional weight is fundamentally undesirable, it is much safer:

• skip the loading phase;
• use a standard small dose;
• or stop taking the supplement if its benefits do not outweigh the discomfort.

Severe swelling does not require a diuretic “just in case,” but rather an investigation of the cause.

When "water retention" no longer resembles the normal effect of creatine

The typical response to creatine is a moderate increase in mass and sometimes a feeling of fuller muscles, especially after loading.

You should be wary if a completely different picture emerges:

• severe swelling of the ankles or shins;
• noticeable asymmetry of the legs;
• swelling of only one limb;
• the skin remains indented after pressing;
• rapidly increasing swelling of the face or body;
• dyspnea;
• chest pain;
• marked decrease in urination.

Swelling accompanied by shortness of breath or chest pain requires prompt medical evaluation, as such symptoms may be associated with conditions significantly more serious than diet or sports supplements. Sudden unilateral leg swelling also requires urgent evaluation for possible thrombosis.[38]

So the principle is very simple: regular intramuscular water from creatine should not be used as an explanation for any swelling that occurs.

Creatine and kidney, heart, or liver disease

In healthy adults, standard doses of creatine have a well-established safety profile, but individuals with pre-existing medical conditions are in a different clinical group.[39]

New weight gain or swelling in patients with chronic kidney disease, heart failure, or liver disease should be treated with particular caution, as these conditions themselves can disrupt fluid regulation.

If a person already has fluid restrictions, is taking diuretics, or is under the supervision of a nephrologist or cardiologist, the issue of supplementation is best discussed individually.

In such a situation, the change in mass cannot be considered a harmless intramuscular hydration.

What is often misunderstood

"Creatine retains water under the skin."

Not proven. Short-term changes are particularly associated with total and intracellular water, and studies do not show a persistent pathological shift of fluid into the subcutaneous space. [40]

"Creatine will definitely make your face swell."

There is no reliable evidence that regular creatine monohydrate specifically causes facial swelling. Severe facial swelling should be assessed separately, especially if it develops suddenly.

"The 2kg gain means creatine made me fatter."

No. Rapid early gains are much more likely to reflect water, and controlled studies show no increase in fat mass due to creatine itself.[41]

"If water enters the muscles, the body becomes dehydrated."

This theory is not supported by controlled studies. A systematic review found no impairment of hydration or thermoregulation even with exercise in the heat.[42]

"To avoid getting drunk, you need to drink less."

No. Restricting water intake just because of creatine is not necessary, and it can be harmful during training or in hot weather.

"I gained a kilogram of muscle in a week on InBody—that's real muscle growth."

Not necessarily. A short-term increase in total water with creatine can be registered by the device as an increase in lean mass. [43]

"Download required"

No. Small daily doses also gradually saturate muscle stores. [44]

A practical approach if you're concerned about creatine water loss

If a person is just starting supplementation and doesn't want to see a rapid spike in weight, the simplest approach is to skip loading and use a standard amount of creatine monohydrate, about 3-5 g daily. Saturation will occur more slowly, but the likelihood of sudden water gain will be lower. [45]

If your weight has already increased after loading, don't panic over a single number on the scale. It's important to assess whether the change is simply a feeling of fuller muscles or actual tissue swelling.

When losing weight, it is best not to use creatine during the first few weeks to accurately compare body fat percentage or muscle mass between two InBody or similar device measurements.

If obvious swelling appears, especially in the legs or face, persists, or is accompanied by other symptoms, do not attempt to "dry out" on your own. The underlying cause should be assessed separately.

Key points from experts

Darren G. Candow, PhD, is a professor of exercise physiology, nutrition, and aging at the University of Regina and director of the Aging Muscle and Bone Health Laboratory. His research focuses on creatine monohydrate and its effects on muscle, bone, and brain. [46]

In a joint scientific review by Candow, Jose Antonio, and other researchers on the most common misconceptions about creatine, the authors concluded that a short-term increase in water intake is indeed possible, especially at the beginning of supplementation, but long-term use does not always lead to an increase in total water intake or permanent pathological fluid retention. Studies on water compartments yield inconsistent results, so the formula "creatine always causes water retention" is too categorical. [47]

Jose Antonio, PhD, is a professor of Exercise and Sports Science, Department of Health and Human Performance, Nova Southeastern University; he is a researcher in sports nutrition and dietary supplements. His academic background highlights his specialization in sports nutrition and supplements. [48]

Antonio et al., in the same evidence-based review, emphasize the fundamental difference between the early increase in intracellular water and the concept of chronic "edema." The authors also note that small daily doses of 3-5 g are effective and allow one to bypass the loading phase that is most often accompanied by noticeable early changes in body weight. [49]

Frequently Asked Questions

Does 5g of creatine every day cause water retention?

It may increase muscle hydration, but not everyone experiences significant water retention. At the standard dose, the changes are usually less dramatic than with a loading dose of 20 g/day. [50]

How long does it take for water to start adding?

When loading, changes can appear within the first few days. In studies, increases in water were recorded after three and seven days of use. [51]

How many kilograms can you gain?

With rapid loading, reviews describe approximately 1-3 kg of early gain, primarily due to total water. With 3-5 g without loading, the change usually develops gradually and varies greatly. [52]

Is this water inside the muscle or under the skin?

Most often, the short-term effect is associated with intracellular water, but studies show different changes in compartments. A persistent pathological accumulation of subcutaneous water has not been proven. [53]

Can creatine cause swelling in the face?

Specific, pronounced facial swelling is not an expected, proven effect. If the face is truly swollen, other causes should be considered.

Does creatine make your belly fat?

Creatine hasn't been proven to cause water retention specifically in the abdominal area. Large single doses may cause gastrointestinal distension or discomfort, sometimes mistakenly referred to as "water retention."

Will the water go away after cancellation?

Probably yes, as elevated muscle creatine stores gradually return to baseline levels. This process typically takes weeks rather than hours. [54]

Is it possible to skip the download?

Yes, it speeds up saturation, but is not necessary. [55]

Is it better to drink 3g if I'm afraid of water?

3g daily is an effective gradual regimen and may make early weight changes less noticeable than high loading.[56]

Should you drink more water?

There is no specific additional requirement just for creatine. Research does not show that standard doses impair hydration. [57]

Does creatine cause dehydration?

The body of controlled studies does not support this.[58]

Can water weight interfere with weight loss?

It may temporarily hide the decrease in fat mass on the scale, but it does not mean that fat has stopped decreasing.

Does Creatine Distort InBody?

Yes, it can. An increase in total water can be registered by bioimpedance as an increase in fat-free mass. [59]

Does creatine distort DEXA?

Short-term changes in water and muscle metabolites can alter lean mass calculations using dual-energy X-ray absorptiometry.[60]

Do you need diuretics if you have gained weight?

No. Regular creatine supplementation does not require diuretics.

When is swelling dangerous?

If the swelling is severe, unilateral, leaves a pit when pressed, or is accompanied by chest pain and shortness of breath, it should not be attributed to creatine - a medical evaluation is needed. [61]

Main

Creatine can indeed temporarily increase the amount of water in the body, especially during the first days of the loading phase. At 20 g/day, early weight gain can sometimes reach 1-3 kg, with a significant portion of this being water, not fat. [62]

But the term "water retention" is often misleading. It doesn't necessarily mean swelling or fluid accumulation under the skin. Creatine is osmotically active, so increasing its stores primarily alters muscle tissue hydration. Studies of long-term supplementation, however, do not always find a sustained increase in total or extracellular water. [63]

For someone concerned about sudden weight gain, the simplest option is to skip the loading phase and use a standard 3-5 g of creatine monohydrate daily. Tissue saturation results develop more slowly, but weight changes are usually less dramatic. [64]

If, instead of a small weight gain, real swelling of the legs, hands or face appears, especially asymmetrical or accompanied by shortness of breath, chest pain or a marked decrease in urine, this condition cannot be automatically attributed to creatine. [65]