Does Creatine Cause Weight Gain?

By Natasha Leaney, Registered Nutritionist (RNutr), BAppSc (Human Nutrition) · Published 13 October 2026 · 7 min read

Why can the scale move after starting creatine?

A change on the scale after starting creatine does not tell you exactly what has changed. Body weight includes water, fat mass, muscle, bone, organs and the contents of the digestive system. Creatine can affect some of these measurements, especially body water and estimates of fat-free mass, so a single weigh-in cannot show whether you have gained fat.

Short-term water retention is a recognised response to creatine supplementation, particularly during protocols designed to increase muscle creatine stores quickly. The 2021 review by Antonio and colleagues concluded that creatine may increase water retention over the short term, while longer-term findings for total body water and its distribution are less consistent. ²

An early increase in body mass should not automatically be labelled as fat gain, and not every person will gain the same amount or follow the same timeline. Hydration, food intake, training, measurement conditions and individual response can all affect the scale.

Creatine water weight and body fat are different

Water mass and fat mass are different components of body composition. Creatine is osmotically active, which means changes in stored creatine can be accompanied by changes in water associated with muscle tissue. This can increase measured body mass without establishing an increase in body fat. ^1,2 For more on water retention and bloating, see Creatine Side Effects, Safety & Digestive Health.

The ISSN misconception review states that creatine supplementation does not increase fat mass across the populations considered in the review. A 2024 systematic review and meta-analysis of 143 randomised controlled trials also found a small average increase in body mass and estimated fat-free mass, alongside a small reduction in body-fat percentage. The authors emphasised that effects were more robust when creatine was combined with resistance training. ^2,3

Fat-free mass: Everything in the body that is not fat mass. Depending on the measurement method, fat-free mass includes muscle, water, bone and organs. It is not the same as newly built muscle.

Some body-composition devices estimate tissue compartments partly from body water, so a rise in a “lean mass” reading soon after starting creatine may partly reflect changes in body water. Focus on trends over time rather than a single measurement and interpret results alongside your training program and the method used to assess body composition.

Is creatine good for weight loss?

Creatine is not a weight-loss supplement. It does not directly establish an energy deficit, and the cited evidence does not justify claims that creatine burns fat, suppresses appetite or guarantees a lower body weight. You can also see the scale rise while your body composition remains stable or changes in another direction.

Some research has reported small reductions in body fat measures when creatine is combined with resistance training. In a 2024 meta-analysis of adults younger than 50, creatine plus resistance training produced greater average changes in lean body mass, body-fat percentage and fat mass than resistance training alone. A broader 2024 meta-analysis also reported a small reduction in body-fat percentage across trials. ^3,4

Those trials all involved training, their protocols varied, and average group changes do not guarantee your result. Any body-fat change depends on the whole program, not creatine alone.

Can creatine indirectly support a training program focused on body composition?

Creatine’s established role in sports nutrition is to increase muscle creatine stores and availability, which can support performance during high-intensity exercise and resistance training. The ISSN position stand reports that increased intramuscular creatine can support high-intensity exercise performance and training adaptations. ¹

Because of this, creatine may indirectly support body composition goals if it helps you train harder or more consistently over time. Factors such as training quality, nutrition, recovery, adherence, starting status and individual response remain important.

The evidence, step by step:

1. Creatine increases muscle creatine availability under studied protocols. ¹
2. It may support repeated high-intensity exercise and resistance-training outcomes in suitable populations. ^1,5
3. Resistance training can change body composition over time.
4. These steps do not prove that creatine independently causes weight loss or fat loss.

When consumed as part of a healthy, varied diet with an appropriate training or exercise program.

Body composition is better assessed over months than days

Daily body weight can move for reasons unrelated to changes in fat tissue, including hydration, carbohydrate storage, sodium intake, food volume and measurement timing. Creatine adds another reason to avoid reading too much into a short-term scale change: early water retention may occur while longer-term body-composition outcomes are studied over repeated training sessions and longer interventions. ^2,3

For a more useful trend:

1. measure under similar conditions, such as at a consistent time of day;
2. look at a series of measurements rather than one number;
3. keep the measurement method consistent;
4. interpret scale weight alongside training performance, waist or clothing fit, and a professionally administered body-composition assessment where appropriate;
5. avoid changing the plan solely because of a short-term fluctuation.

These steps are measurement suggestions, not medical advice or a promise that a particular body-composition outcome will occur. Consumer body-composition devices also have limitations, particularly when hydration changes.

How Musashi Creatine Monohydrate Powder fits this topic

Musashi offers creatine monohydrate in powder, capsule and chewable formats, and the amount of creatine in each labelled serve differs by format. Musashi Creatine Monohydrate Powder is a Fuel-system powder made with creatine monohydrate, available in Unflavoured (350 g and 600 g), Berry (420 g) and Blue Raspberry (420 g), with 5 g of creatine monohydrate per serve.

The product is a creatine-monohydrate format, not a weight-loss product. Follow the directions on the product label. For dosing and timing, see How to Take Creatine: Dosage, Timing & Method.

Always read the label. Use only as directed. Supplementary to and not a replacement for a balanced diet.

Key takeaways about creatine and weight gain

• Creatine can increase scale weight without increasing body fat. ²
• Short-term water retention may occur as muscle creatine stores rise. ^1,2
• A single weigh-in cannot show whether water, fat or fat-free tissue changed.
• Creatine is not a weight-loss or fat-burning product.
• Body-composition changes in the research were most consistent when creatine was combined with resistance training. ^3,4

Frequently asked questions about creatine and weight gain

Does creatine cause weight gain in the first week?

Creatine can increase body mass early in supplementation because short-term water retention may occur as muscle creatine stores increase. The size and timing of any change vary, and a bathroom scale cannot identify the tissue or fluid involved. An early increase should not automatically be interpreted as body-fat gain. ^1,2

Does creatine make you gain body fat?

Current reviews do not show creatine increasing fat mass. Creatine can increase body weight through short-term water retention, and longer-term studies may report changes in fat-free mass when supplementation is combined with resistance training. Scale weight alone cannot distinguish water, fat and other fat-free tissue. ^2,3

Is creatine good for weight loss?

Creatine should not be described as a weight-loss supplement. Some pooled studies report small improvements in body composition measures when creatine is combined with resistance training, but that does not prove creatine independently causes fat loss. Body-composition outcomes depend on the wider training, nutrition and recovery program and vary between individuals. ^3,4

Will creatine make me look bloated?

Creatine can be associated with an early increase in body water, but muscle-associated water and gastrointestinal bloating are different concepts. If the concern is abdominal discomfort rather than scale weight or muscle fullness, the dedicated safety and digestive-health guidance is more relevant. Persistent or concerning symptoms warrant advice from a healthcare professional. ²

How should I track body composition while taking creatine?

Use the same measurement method under similar conditions and focus on trends rather than one reading. Scale weight cannot separate water, fat and fat-free tissue, while consumer body-composition devices can also be influenced by hydration. Interpret results alongside the training program and seek qualified guidance where a precise assessment is important.

References

1. Kreider, R. B., Kalman, D. S., Antonio, J., et al. (2017). International Society of Sports Nutrition position stand: Safety and efficacy of creatine supplementation in exercise, sport, and medicine. Journal of the International Society of Sports Nutrition, 14, 18. DOI record.
2. Antonio, J., Candow, D. G., Forbes, S. C., et al. (2021). Common questions and misconceptions about creatine supplementation: What does the scientific evidence really show? Journal of the International Society of Sports Nutrition, 18, 13. DOI record.
3. Pashayee-Khamene, F., Heidari, Z., Asbaghi, O., et al. (2024). Creatine supplementation protocols with or without training interventions on body composition: A GRADE-assessed systematic review and dose-response meta-analysis. Journal of the International Society of Sports Nutrition, 21(1), 2380058. DOI record.
4. Desai, I., Wewege, M. A., Jones, M. D., Clifford, B. K., Pandit, A., Kaakoush, N. O., Simar, D., & Hagstrom, A. D. (2024). The effect of creatine supplementation on resistance training-based changes to body composition: A systematic review and meta-analysis. Journal of Strength and Conditioning Research, 38(10), 1813–1821. DOI record.
5. Wang, Z., Qiu, B., Li, R., et al. (2024). Effects of creatine supplementation and resistance training on muscle strength gains in adults under 50 years of age: A systematic review and meta-analysis. Nutrients, 16(21), 3665. DOI record.

The information in this article is for educational purposes only and is not intended as medical advice. Always read the label and follow the directions for use. If symptoms persist, consult your healthcare professional. Musashi products are formulated for healthy adults; consult a healthcare professional before use if you have a pre-existing medical condition, are pregnant or breastfeeding, or are taking medication.