Creatine can make the number on the scale go up when you start taking it, partly because of changes in body water. The response varies from person to person and depends, among other things, on how you take it.
A higher number on the scale cannot tell you how much of the change is water, fat or muscle. Nor does it mean that every feeling of bloating or visible swelling is caused by creatine.
To understand creatine and water retention, it helps to look at where water is stored, what can happen in the first few days and how to interpret changes over the following weeks.
Does creatine cause water retention?
Creatine can increase body water, especially in the first few days of a loading phase, when higher amounts are taken for a short period. As creatine levels rise in muscle, osmotic changes may draw water into muscle cells.
That does not mean everyone will gain weight or respond in the same way. Studies use different doses, durations and measurement methods, so their results are not always directly comparable.
A 2021 review by Antonio and colleagues noted that water retention can occur initially, while longer-term findings are less consistent. An early increase also does not mean water weight will keep rising indefinitely.
Intracellular vs extracellular water: what is the difference?
Intracellular water
Water inside cells, including muscle cells. Changes associated with increased muscle creatine can affect this compartment.
Extracellular water
Water outside cells, including in the blood and between tissues. This is a normal part of the body and is not the same thing as oedema.
Total body water
The combined water in both compartments. An ordinary scale measures total body weight; it cannot show where a change has occurred.
Oedema is a build-up of fluid in tissues that can cause visible swelling. It should not automatically be confused with the body-water changes studied during creatine supplementation.
Does creatine make you gain weight?
It can, although the amount and duration vary. In the first few days, a change in water may affect your weight. Over time, training and other factors can also change different parts of your body composition.
You cannot calculate exactly how much of a particular weight change is water without an appropriate assessment. Food intake, fluids, exercise, bowel contents and other normal fluctuations can all affect daily weight.
Does weight gain mean fat gain?
Not necessarily. Body weight includes water, fat, muscle and other tissues. A rapid rise after starting creatine does not establish that you have gained fat, but it also does not prove that the entire change is water.
Is fat-free mass the same as muscle?
No. Fat-free mass includes water, muscle, bone and other tissues. An increase in that measurement should not automatically be described as the same amount of new muscle.
What research says about creatine and body water
Results differ between studies. In a 2025 study, 11 recreationally active women followed different creatine protocols for 14 days. Researchers found no statistically significant changes in body weight or absolute intracellular, extracellular or total body water. The small sample limits how confidently the findings can be applied to other people.
Another 2025 trial investigated creatine and resistance training over several weeks. It highlighted how body water can complicate the interpretation of fat-free mass measurements. Its design included a group that received neither creatine nor a placebo, which is a limitation to consider.
Together, these studies illustrate the variability: some protocols show changes in body water and others do not. No specific number of kilograms or timeline can be guaranteed for everyone.
How long does creatine-related weight gain last?
There is no universal timeline. An initial change may level off, while weight continues to fluctuate with training, diet and other factors. Studies lasting several weeks do not always show the same pattern of body-water change.
After you stop taking creatine, muscle creatine stores gradually decline and your weight may change. However, it is not possible to predict precisely how long this will take or how much weight an individual will lose.
If you compete in a weight-class sport or have an upcoming weigh-in, account for this variability when planning supplementation with a sports nutrition professional.
How to interpret weight changes over time
Look for trends
Compare several measurements taken under similar conditions instead of treating a difference between two days as a change in body composition.
Consider the context
Note when you started creatine and whether your training, diet or routine has changed.
Revisit your goals
If weight matters for your sport, health or wellbeing, a professional can help you decide which information is useful.
Understand the limits
Body composition methods have limitations and can be affected by hydration. A single reading cannot explain the whole change.
Do you need to drink more water when taking creatine?
There is no universal amount of extra water you need solely because you take creatine. Stay appropriately hydrated for your needs, activity level and the temperature, without forcing yourself to drink excessive amounts.
If you have been advised to restrict fluids or have a condition that affects hydration, follow the guidance of your healthcare team.
What to look for in a creatine supplement
Check the form of creatine, the amount per serving and the instructions. Centenarian Road Creapure® creatine monohydrate lists creatine monohydrate as its only ingredient and recommends a 3 g daily serving.
A loading phase is not essential: a daily approach without loading can increase muscle stores more gradually. For more information, read our guide to creatine monohydrate.
When to seek medical advice about swelling
Do not automatically attribute new, visible or persistent swelling to creatine. It can have several causes and warrants medical assessment, particularly if it affects one leg, starts suddenly, is painful or comes with redness.
If swelling is accompanied by difficulty breathing, chest pain or coughing up blood, seek urgent medical care.
Frequently asked questions about creatine and water retention
Can creatine cause puffiness under the skin?
Changes in body water do not establish that visible or localised puffiness is caused by creatine. If swelling appears or persists, seek advice from a healthcare professional.
Can you avoid all weight changes by skipping the loading phase?
There is no guarantee. Taking creatine without a loading phase increases muscle stores more gradually, but individual responses and other causes of weight fluctuations vary.
Can a body composition scale tell me how much water creatine has added?
Not reliably from a single reading. Bioelectrical impedance measurements are sensitive to hydration and other conditions, so use them cautiously and look at trends rather than treating the result as an exact measurement.
Should I stop taking creatine if the scale goes up?
A change on the scale needs to be considered alongside your goals and circumstances. If it concerns you, is substantial or comes with swelling, speak to a healthcare professional rather than assuming the cause.
Scientific references and sources
Sources reviewed: 29 October 2026. Individual responses can differ from study averages.
- Antonio J et al. Common questions and misconceptions about creatine supplementation. Journal of the International Society of Sports Nutrition. 2021. Review of creatine and body water.
- Creatine monohydrate supplementation strategies on body composition and water distribution in female recreational athletes. 2025. Fourteen-day study with 11 participants.
- The Effect of Creatine Supplementation on Lean Body Mass with and Without Resistance Training. 2025. Study of body composition and resistance training.
- NHS: swollen ankles, feet and legs (oedema). Guidance on signs requiring medical attention.
- Centenarian Road: Creapure® creatine monohydrate product information.
