In short. Creatine is a natural substance stored mainly in the muscles. ATP is the energy molecule used during short, intense exercise. Creatine monohydrate is the most researched form, and other forms have not been shown to work better. The only authorised EU claim is that creatine increases physical performance in successive bursts of short-term, high-intensity exercise, for adults performing high-intensity exercise, in the context of a daily intake of 3 g. This is information, not medical advice.
What is creatine and where does it come from?
Creatine is a substance formed from amino acids. The body makes a small amount itself, mainly in the liver and kidneys, and it is also found in foods such as meat and fish. About ninety-five per cent of the body's stores are located in the skeletal muscles, where it is largely kept as phosphocreatine. A supplement simply adds to these existing stores; it does not introduce anything foreign to the body.
Because muscle is the main storage site, the amount a person carries depends on diet, muscle mass and individual differences. People who eat little or no meat or fish generally start from a lower baseline.
How does creatine work in the body?
During short, strenuous exercise, muscle cells rely on a molecule called ATP. ATP releases energy when it loses one phosphate group and becomes ADP. To keep contracting at high intensity, the cell must quickly rebuild ATP, and phosphocreatine is the fastest way to do that on site: it gives its phosphate group to ADP to restore ATP. A larger store of phosphocreatine means this rapid recycling can continue slightly longer before the cell has to fall back on slower energy pathways. This is the mechanism behind the one authorised EU claim, which is limited to repeated bursts of short, high-intensity exercise and is made in the context of a daily intake of 3 g for adults performing high-intensity exercise.
It is worth being precise about what this does not mean. Creatine is being studied in several other areas, including cognition and recovery, but these are not authorised health claims in the EU and the evidence remains preliminary. We mention them only to be honest about the boundary between one approved claim and ongoing research.
Creatine monohydrate versus other forms
Creatine exists in several chemical forms. They differ in how the creatine is bound and marketed, not in what they become after absorption: it remains creatine. The table below is for information.
| Form | What it is | General characteristic (for information) |
|---|---|---|
| Creatine monohydrate | Creatine bound to one water molecule | The most researched form, dissolves well with enough water, the usual reference |
| Creatine hydrochloride (HCl) | Creatine bound to one hydrochloride group | More soluble in water, marketed for smaller doses, but not shown to work better than monohydrate |
| Creatine ethyl ester | An esterified form of creatine | Promoted for absorption, but research shows no advantage over monohydrate |
| Buffered creatine | Creatine with one added alkaline agent | Marketed as gentler, with no consistent evidence that it outperforms monohydrate |
The practical conclusion is simple: monohydrate is the best researched and most tested form, and newer forms have not been shown to be more efficient. The differences are mainly in price, solubility and marketing.
How is creatine dosage generally approached?
Dosage is usually discussed in two patterns. A loading approach uses a higher daily amount for a short period, divided across the day, to fill muscle stores faster, followed by a smaller maintenance amount. A daily approach skips loading and uses a consistent daily amount, with similar stores reached more gradually over several weeks. Both routes can fill muscle stores; loading is mainly faster, not better. The authorised EU performance claim is made in the context of a daily intake of 3 g for adults performing high-intensity exercise. We describe these patterns for clarity and do not prescribe a personal dose: follow the product label and local guidance, and ask a doctor or pharmacist about your situation.
Who typically uses creatine?
Creatine is most commonly associated with adults who perform repeated bouts of short, high-intensity exercise, which is the target group and context of the authorised claim. Creatine is not a stimulant and is chemically different from caffeine.
What does quality mean in a creatine supplement?
Quality is mainly about purity and verification. Because creatine is taken regularly, it is reasonable to look for a form produced to a controlled standard and efficiently tested for contaminants. Creapure is one example of a quality-tested creatine monohydrate, mentioned here only to illustrate what a tested form can look like, not as a unique requirement. A clear label, one named form and third-party or batch testing matter more than proprietary marketing terms. Our own approach to creatine is described with our micronised creatine monohydrate powder. Quality does not change what creatine does in the body; it is about how reliably the product delivers it.
Is creatine safe?
Creatine is one of the most researched ingredients in sports nutrition and is generally well tolerated by healthy adults in commonly used amounts. The most frequently reported effects are mild and related to digestion, such as stomach discomfort, and some people notice a small short-term increase in body weight from water retained in the muscle. Taking it with enough fluid is sensible. People with impaired kidney function, or kidney disease, should be cautious and seek advice first, because the kidneys process creatine and its breakdown products. Do not use more than the amount on the label without advice. If you are pregnant or breastfeeding, take medication or have a medical condition, consult a doctor or pharmacist before use. Supplements are no substitute for a varied diet or medical care.
Curious whether women should take creatine? Read what trials in women actually measured and how the results may differ from what you expect.
Frequently asked questions
Is creatine monohydrate better than other forms?
Monohydrate is the most researched form, and newer forms such as hydrochloride or ethyl ester have not been shown to work better. Monohydrate is usually the sensible reference choice. The differences between forms mainly concern solubility, price and marketing.
Do I need a loading phase?
No. Loading primarily fills muscle stores faster; a consistent daily amount reaches a similar level over several weeks. Neither approach changes what creatine does. Follow the product label and ask a doctor or pharmacist if you are unsure.
Does creatine only help with sports performance?
The only authorised EU claim is limited to physical performance in successive bursts of short-term, high-intensity exercise, for adults performing high-intensity exercise, in the context of 3 g per day. Other areas, such as cognition, are being researched but are not authorised health claims and remain preliminary.
Will creatine make me gain weight?
Some people notice a small short-term increase in body weight because the muscle retains slightly more water. This is water in the muscle, not fat. It varies from person to person and is not certain to occur.
What does Creapure mean on a label?
Creapure is one example of a quality-tested creatine monohydrate. Seeing it indicates a tested form, but it is one example among others; a clear label, one named form and batch or third-party testing are the broader signs of quality.
Sources
- EFSA Panel on Dietetic Products, Nutrition and Allergies. Scientific opinion on the substantiation of health claims related to creatine and an increase in physical performance during short-term, high-intensity, repeated exercise bouts. EFSA Journal.
- Regulation (EU) No 432/2012 establishing a list of permitted health claims made on foods.
- Regulation (EC) No 1924/2006 on nutrition and health claims made on foods.
- 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.
Written by the NOTFORTOMORROW editorial team. How we conduct our research: we base factual statements on the official EU claims register and peer-reviewed sources, cite our sources and date our reviews. This article is information, not medical advice; consult a qualified professional about your situation. Last reviewed: 2026-06-06.
