For decades, creatine has been associated mainly with the gym, but a growing body of research suggests its role in the brain — an organ with enormous energy demands — may be just as interesting as its role in muscle.
TL;DR — key takeaways
A systematic review of randomized controlled trials, published in Nutrition Reviews, gathered the available data on the effect of creatine supplementation on cognitive function in healthy individuals. The authors focused exclusively on placebo-controlled studies, which allows for more reliable conclusions than single, uncontrolled observations.
Effects of creatine supplementation on cognitive function of healthy individuals: A systematic review of randomized controlled trials
Moderate evidenceProkopidis K, Giannos P, Triantafyllidis KK, Kechagias KS, Forbes SC, Candow DG · Nutrition Reviews · 2023
A systematic review of randomized controlled trials found that creatine supplementation may improve certain aspects of cognitive function, particularly short-term memory and processing speed, with a more pronounced effect under conditions of sleep deprivation or metabolic stress.
View studyThe brain, despite making up only about 2% of body mass, consumes a disproportionately large share of energy — and phosphocreatine, just as in muscle, serves neurons as a rapidly available energy buffer supporting ATP production at moments of increased demand. In theory, higher creatine availability in brain tissue could therefore support neuron function under conditions of increased cognitive load.
A stronger effect under sleep deprivation and metabolic stress
Moderate evidenceInterestingly, some of the studies included in the review found a more pronounced effect of creatine on cognitive function in sleep-deprived people or under acute metabolic stress than in well-rested people — suggesting creatine may work mainly as a buffer under conditions of increased brain energy demand, rather than as a universal intelligence "booster."
The classic 2003 study by Rae and colleagues, one of the first to examine creatine and cognition, found a more pronounced improvement in working memory and processing speed in vegetarians than in meat-eaters — which makes biological sense, since a vegetarian diet supplies far less creatine from food, meaning baseline stores in the body (including likely in the brain) tend to be lower.
Oral creatine monohydrate supplementation improves brain performance: a double-blind, placebo-controlled, cross-over trial
Moderate evidenceRae C, Digney AL, McEwan SR, Bates TC · Proceedings of the Royal Society B: Biological Sciences · 2003
A double-blind, placebo-controlled cross-over trial found improved working memory and processing speed after creatine supplementation, with a more pronounced effect in people following a vegetarian diet.
View studyBeyond young adults and vegetarians, older adults are the third group in which creatine's effect on cognition has been studied — a particularly relevant population given the natural decline in both muscle mass and certain cognitive functions with age. Available, though still limited, research suggests older adults may derive a comparable or even somewhat greater cognitive benefit from creatine supplementation than younger people, which partly aligns with the general hypothesis that creatine's effect on the brain is stronger where baseline phosphocreatine stores in tissue are lower — a condition that applies to both vegetarians and older adults.
| Goal | Typical dose | Evidence level |
|---|---|---|
| Muscular endurance and strength | 3-5 g daily | Very strong |
| Cognitive function (research) | Usually a similar range of 3-5 g, some studies use higher doses short-term | Moderate, fewer studies |
A comparison of typical creatine supplementation protocols
It's worth stressing that research on creatine and cognition is far less extensive and less methodologically consistent than decades of solid research on creatine and muscular performance — there is not yet a separate, well-established dosing protocol "for the brain" distinct from the standard sports dosing.
Still an early stage of research
The review's authors highlight the small sample sizes in most available studies, the varied cognitive tests used across studies, and short observation periods — this is an area that needs more large, long-term studies before recommendations as strong as those for muscular effects can be made.
Creatine remains one of the best-studied supplements for physical performance — a potential additional cognitive effect, while promising, still needs more solid evidence before it can be treated as a primary reason for supplementation rather than a pleasant side benefit.
If someone asked me purely about the cognitive effect, I'd wait for more large studies. But since creatine already has solid evidence for muscular performance with minimal risk, a potential bonus for the brain is an added argument, not the main one.
Michał Nowak, VitMode editorial team
There's no evidence that creatine raises intelligence in a general sense — available research instead suggests improvement in specific aspects, like working memory or processing speed, particularly under conditions of increased load (e.g. sleep deprivation).
No — research on creatine's effect on muscular performance is far more extensive and consistent than research on its effect on cognition, where the evidence is still only moderate.
Data suggests that people on a plant-based diet, with lower baseline creatine stores from food, may see a more pronounced cognitive benefit from supplementation than people who regularly eat meat.
Michał Nowak
MSc in Clinical Dietetics, certified sports-nutrition coach
Michał specializes in metabolic nutrition, intermittent fasting and sports supplementation.
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Kasia W. 2 weeks ago
Very clearly explained, especially the interactions section — I hadn't seen it laid out this well anywhere else.
Marek T. a month ago
Are you planning to update this with the newest study from this year? I saw an interesting meta-analysis.