Creatine in women: what research has shown
Creatine is the most studied supplement on the shelf, but trials involving women make up a smaller portion of this research. What is known comes down to three things: women's baseline stores are lower, the effect on strength is reproducible, and the fear of "water retention" refers to the first few days of intake, not the final result.
Why it works differently for women
In a review on creatine use in women, the starting point is formulated as follows: women's endogenous creatine stores are 70–80% lower than men's. This leads to the assumption that supplementation might mean more for them, not less.
The review then describes the state of the evidence honestly: in premenopausal women, creatine intake improves strength and exercise performance; after menopause, effects on muscle size and function have been noted at high doses (0.3 g per kilogram of body weight per day), as well as a beneficial effect on bone — but only in combination with resistance training.
An important caveat that should be made before, not after: two authors of this review indicated in their conflict of interest statement that they consult for a creatine manufacturer. This does not automatically cast a shadow on the findings, but it is worth reading them with this knowledge.
"Water retention": what is actually known
The most common argument against creatine in women is analyzed in a review of common misconceptions about creatine. Water retention is indeed the most common effect, but it relates to the first few days of intake: in studies of three-day intake, total body water, extracellular water, and intracellular water increased. The review calls the extrapolation of these short-term data to long-term intake unfounded.
The second fear is that creatine will add fat. Randomized trials lasting from one week to two years do not confirm this; in a summary of the data, participants who took creatine, on the contrary, reduced their body fat percentage more, and the difference in absolute fat mass was about 0.5 kg in favor of creatine.
Doses: how much is actually needed
The same review states: small daily doses are effective — 3–5 g or 0.1 g per kilogram of body weight, and a "loading" phase is not necessary. Loading accelerates muscle saturation, but the end result is the same, and the likelihood of abdominal discomfort is higher.
| What | What it looks like |
|---|---|
| Form | monohydrate — the form on which the bulk of research is based |
| Dose | 3–5 g per day, including rest days |
| Loading | not required |
| Timing | does not matter |
High doses of 0.3 g/kg from studies on postmenopausal women are about 20 g per day, which is a specific trial regimen, not a general recommendation.
What creatine does not do
- Does not replace training. The bulk of the effects in studies were obtained in combination with resistance training; without it, there is nothing to discuss.
- Does not affect weight in the way people think. The gain in the first few days is water in the muscles, not fat.
- Is not a hormonal substance. This is a question that is addressed separately in the review of misconceptions.
How creatine compares to other products is covered in the article on sports supplements, and what was measured outside the gym is in the article on creatine and the brain.
When a doctor is needed
Pregnancy and breastfeeding are conditions for which data on creatine intake are scarce, and the decision is made by a doctor. The same applies to kidney disease: with these, any supplements should be discussed with a doctor, rather than chosen independently.
Regarding adolescents: the review assesses the available data as limited, so this is also a conversation for a doctor, not an independent decision.
What to do before buying
- Make sure you are training. Without it, there will be no measurable effects.
- Choose monohydrate. Other forms are more expensive, and no advantages over it have been shown in studies.
- Check the composition and dose per serving. In "women's" complexes, creatine is often dosed lower than what has been studied; what to look for is in the article on the contents of a sports nutrition tub.
- Do not expect an effect on the scale. You should look at working weights and how you feel during training, while the weight in the first few days will change due to water.
Frequently asked questions
- Do women need creatine?
- Women's endogenous creatine stores are 70–80% lower than men's, and in premenopausal women, supplementation has been shown to improve strength and exercise performance. This refers to a combination with resistance training — creatine itself does not replace it.
- Is it true that creatine causes "water retention"?
- Water retention is the most common effect during the first few days of intake. Reviews of common misconceptions do not confirm that this persists with long-term use.
- Can creatine add fat?
- Randomized trials lasting from one week to two years do not show this: in data syntheses, the creatine group reduced body fat percentage more effectively, and the difference in fat mass was about 0.5 kg in favor of creatine.
- What dose of creatine is needed and is a loading phase necessary?
- 3–5 g per day or 0.1 g per kilogram of body weight daily is effective; a loading phase is not required. Doses of 0.3 g/kg refer to studies on postmenopausal women, not to daily intake.
- Can creatine be taken during pregnancy?
- There is insufficient data for such a recommendation, and the decision should be made by a physician. The same applies to breastfeeding, kidney disease, and adolescence.
Read next
- Sports supplements: creatine, glutamine, lecithin — The sports nutrition shelf is arranged so that expensive and useless products stand next to cheap and effective ones.
- Creatine and the brain: what has been measured outside the gym — Creatine is one of the few sports supplements with a solid evidence base for strength performance.
- What ends up in a sports nutrition tub besides the powder — In Russia, sports nutrition is sold as dietary supplements, and this defines everything else: they are not tested for efficacy, and the composition on the label is a manufacturer's claim, not the result of an analysis.
This article is for general information. It is not medical advice, a diagnosis, or a prescription for treatment or a diet, and it does not replace a consultation with your doctor. If you have a health condition, are pregnant, take medication, or follow a diet prescribed to you, decisions about food belong with your doctor.
Figures from regulations, guidelines and studies are given as they stood when this article was prepared and may since have changed; check them against the primary sources. This article is not advertising, an offer, or individual advice, and neither the author nor the site owner is responsible for decisions taken on the basis of it.