Creatine, Mood and Brain Function in Women: The Evidence So Far

Woman sitting on an exercise mat in a park holding a pouch of Ritua Creatine for Women
Jasmine Meagher, founder of Ritua
Jasmine Meagher, BSc Food Science and Nutrition
Founder, Ritua · 8 min read

Creatine spent thirty years being sold as a muscle supplement, and in the last two it has been rebranded almost overnight as a brain supplement. The claims have got ahead of the evidence in places, and the honest version of this story is more interesting than the marketing version.

Here is what the research on creatine, cognition and mood actually shows, including the parts that did not replicate, the statistical argument currently running through the literature, and where the signal genuinely looks strongest for women.

Why the Brain Uses Creatine at All

The reason anyone started testing creatine on cognition is not marketing, it is biochemistry. Creatine is part of the phosphocreatine system, a rapid energy buffer that helps regenerate ATP when a cell is working hard. Muscle uses it. So does the brain, which is one of the most metabolically expensive organs in the body and runs on a very small local energy reserve.

That gives a clean theoretical prediction. If creatine helps at all with thinking, it should help most when brain energy supply is under pressure, and least when a well rested person is already operating comfortably. Hold on to that prediction, because it turns out to describe the results fairly well.

The Meta-Analysis Everyone Quotes, and the Objection to It

Most of the "creatine is good for your brain" content circulating online traces back to one paper: a 2024 systematic review and meta-analysis in Frontiers in Nutrition, which pooled sixteen randomised controlled trials across 492 adults. It reported significant benefits for memory, attention time and processing speed time, with a memory effect size of 0.31 and no significant effect on overall cognitive function or executive function.

That is usually where the summary stops. It should not, because the paper has since attracted a specific and serious statistical objection.

A 2026 commentary in the same journal points out a unit-of-analysis error. Several of the included trials reported many cognitive subtests from the same group of people, and those subtests were treated as though they were independent studies. In the memory analysis, individual trials contributed as many as seven separate results each, which is how a pool of 492 randomised participants ends up reported as 1,000 observations. Double counting like this artificially inflates precision and makes a weak effect look statistically solid. The commentary also notes that the European Food Safety Authority raised the same concern in its 2024 opinion on creatine and cognition, and concluded that no firm conclusions could be drawn from that pooled data. When a closely related memory meta-analysis was re-run correctly after a similar objection, its overall effect disappeared except in older adults.

The Study That Tried to Replicate the Famous Result

The single most cited creatine and cognition study is a small 2003 trial in vegetarians that found a large effect on working memory and reasoning. It is the reason the idea took hold in the first place. In 2023 a much larger, preregistered, double blind, placebo controlled crossover trial set out to replicate it, with 123 participants taking 5 grams a day for six weeks, roughly half vegetarian and half omnivore.

The result was considerably more modest. The working memory measure came close to significance without reaching it, the reasoning measure did not, and none of the eight exploratory cognitive tasks showed a benefit. Vegetarians did not respond any better than omnivores, which undercuts the popular theory that people with low dietary creatine have the most to gain. The authors' own conclusion was that creatine may have a small beneficial effect and that larger trials are needed to confirm or rule it out.

That is a genuinely useful finding, and it is worth saying that a small real effect, scaled across years and across a lot of people, is still worth having. It is just not the dramatic result the original study suggested.

Where the Signal Looks Strongest: the Tired Brain

This is where the evidence gets more convincing, and it lines up with the biochemistry. A 2024 trial published in Scientific Reports put 15 healthy young adults, 8 of them women, through 21 hours without sleep, gave them either a single very large dose of creatine or a placebo, and tracked both brain energy metabolites and cognitive performance across the night using magnetic resonance spectroscopy.

A single dose of creatine measurably shifted brain energy chemistry during sleep deprivation and partly offset the drop in cognitive performance and processing speed. The effect peaked around 4 hours after the dose and was still detectable at 9 hours.

Two things matter about this trial. The first is that it measured brain chemistry directly rather than inferring it, so it demonstrates that oral creatine reached the brain and changed something there. The second is the dose: 0.35 grams per kilogram of body weight, which works out around 24 grams for a 70 kilogram person, taken once. That is a research dose designed to force a measurable acute change, not a daily habit.

So this study is good evidence that the brain uses creatine and that a big acute dose can blunt sleep deprivation. It is not evidence that 5 grams a day will make you sharper on a normal Tuesday.

Do Women Respond Differently?

There is a signal here, and it deserves both attention and caution. In the 2024 meta-analysis, the subgroup analysis by sex found a significant effect on processing speed time in women across four studies, with an effect size of 0.87, while the three studies in men showed no significant effect. The difference between the two groups was itself statistically significant.

Taken at face value that is striking. Taken carefully it is a subgroup finding, drawn from a small number of trials, inside a meta-analysis whose pooling method has been challenged. It is a lead worth following, not a settled result.

What makes the lead plausible is that there is a mechanism behind it. A 2025 review in the Journal of the International Society of Sports Nutrition on creatine across women's reproductive lifespan argues that reproductive hormone status influences how creatine is made, transported and used, and that women tend to start from lower dietary creatine intake and different baseline stores. We have written separately about what that means during perimenopause and menopause and across the menstrual cycle.

Creatine and Mood: What the Survey Data Shows

The mood research is at an earlier stage again, and almost all of the population level data is observational. The most widely cited analysis, published in Translational Psychiatry in 2020, looked at dietary creatine intake and depressive symptom scores across 22,692 American adults in the NHANES survey.

After adjusting for age, sex, education, income, physical activity, BMI, smoking and antidepressant use, people in the highest quartile of dietary creatine intake had lower odds of scoring in the depressive range than those in the lowest, with an adjusted odds ratio of 0.68. When the analysis was split by sex the association held for women, at 0.62, and did not reach significance for men. It was strongest in the 20 to 39 age group and in people not taking antidepressant or anxiolytic medication.

The limits on that finding are important. This is dietary creatine, mostly from meat and fish, not supplementation. It is a cross-sectional survey, so it shows an association at a single point in time and cannot establish cause in either direction. People who eat more creatine-rich food differ in many ways from people who eat less, and no statistical adjustment fully removes that. The researchers' own conclusion was that the relationship warrants further investigation, particularly in women.

To be completely clear about what this does and does not mean: creatine is not a treatment for depression or any other mood condition, and nothing in this literature suggests it should be used as one. If your mood is something you are worried about, that is a conversation for your GP, not a supplement decision.

A Sensible Read of the Evidence

Pulling it together, the fair summary looks something like this. The mechanism is real and well understood. The acute evidence under metabolic stress, such as sleep deprivation, is the strongest part of the case and is backed by direct measurement of brain chemistry. The chronic everyday cognitive benefit in healthy, well rested adults is unresolved, probably small if it exists at all, and the headline meta-analysis supporting it has a methodological problem that has not yet been fixed.

The women-specific signal is one of the more interesting threads in the field, with a plausible mechanism behind it, and it is being actively researched. It is not yet strong enough to build a purchase decision on by itself.

Which leads to a practical point. If you are already taking creatine for the reasons it is best evidenced for, strength, lean muscle and recovery, the cognitive research is a reasonable maybe on top of that, at no extra cost and no extra dose. If cognition is the only reason you would start, the honest answer is that the evidence is not there yet.

The Bottom Line

Creatine is not a nootropic, and the confident claims that it is have outrun what the trials can support. What the research does show is that the brain uses creatine, that supplementation can measurably change brain energy chemistry, that the clearest cognitive effects appear when the brain is under metabolic strain, and that women may be more responsive than men on some measures. That is a promising, unfinished body of work rather than a settled one, and it is worth watching over the next few years.

If you are taking creatine for strength and recovery and are curious about the rest, our creatine for women is 100% pure micronised creatine monohydrate with nothing else added. For a broader look at the evidence base, start with our guide to what the research actually says about creatine for women.

This article is general information, not medical advice, and is not a substitute for guidance from your doctor, particularly if you are managing an existing health condition or taking medication.

Jasmine Meagher, founder of Ritua

Jasmine Meagher

BSc Food Science and Nutrition · Founder, Ritua

Jasmine founded Ritua to bring evidence-based, TGA-compliant supplements to Australian women. She writes about the research behind every ingredient Ritua sells.

FAQs

Does creatine improve memory or focus?

The evidence is mixed. A 2024 meta-analysis reported benefits for memory and processing speed, but its pooling method has since been challenged for double counting results from the same participants. The largest single replication trial, with 123 people taking 5 grams daily for six weeks, found at most a small effect. The honest position is that a small benefit is plausible and not yet demonstrated.

Does creatine help when you are sleep deprived?

This is the best supported cognitive finding so far. A 2024 trial in Scientific Reports found that a single large dose partly offset the decline in cognitive performance caused by 21 hours without sleep, peaking around 4 hours after the dose. The dose used was around 0.35 grams per kilogram of body weight, far above a normal daily serve, so it does not translate directly to everyday use.

Do women respond to creatine differently from men?

Possibly. In the 2024 meta-analysis, the effect on processing speed time was significant in the four studies of women and not in the three studies of men, and the difference between groups was itself significant. Women also tend to have lower dietary creatine intake, and a 2025 review argues that reproductive hormone status affects how the body handles creatine. It is a promising lead based on a small number of studies rather than a firm conclusion.

Is there a link between creatine and mood?

A 2020 analysis of 22,692 adults in the NHANES survey found that higher dietary creatine intake was associated with lower odds of scoring in the depressive range, and the association was significant in women but not men. It is observational survey data on food intake rather than supplements, so it cannot show cause and effect. Creatine is not a treatment for any mood condition, and mood concerns should be discussed with your doctor.

Do vegetarians get more cognitive benefit from creatine?

It is a popular theory, because vegetarians take in far less creatine from food. The 2023 replication trial tested it directly with roughly half vegetarian and half omnivore participants, and found no indication that vegetarians benefited more.

Should I take creatine for brain benefits?

If you already take creatine for strength, lean muscle and recovery, which is what it is best evidenced for, any cognitive effect comes at no extra dose or cost. If cognition would be your only reason to start, the current evidence does not support that decision on its own.

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