Does creatine improve brain function, even without exercise?
Verdict: Uncertain
Creatine has shown benefits on some cognitive tests, including without exercise. A reliable improvement in everyday memory or thinking remains unproven.
Evidence: mixed human trials, with several small studies. Evidence searched: 3 October 2026.
The claim
Taking creatine improves brain function, including in people who do not exercise.
That claim covers several different abilities: remembering information, concentrating, reasoning and responding quickly. A positive result on one test does not establish improvement across all of them.
Evidence at a glance
Why the brain claim needs its own evidence
Creatine is often discussed as a sports supplement, but researchers have also tested it for thinking and memory. Supplementation can increase creatine in the brain, although the cognitive findings remain mixed. More brain creatine does not automatically mean better thinking. [14]
Three questions matter: who was tested, which ability changed, and under what conditions? A finding during a night without sleep should not be presented as proof that a rested person will remember more at work or learn faster.
For the separate muscle-performance question, read Does creatine monohydrate improve strength?
What the best evidence says
UncertainDoes creatine help people who do not exercise?
A 2026 double-blind trial enrolled 73 sedentary adults aged 45 to 65; 64 completed it. Participants chose exercise or no exercise, then were randomly assigned creatine or placebo within those groups. The dose was 10 grams daily for 12 weeks. [1]
Selected comparisons favoured creatine without exercise, including delayed word recall at six weeks. However, the overall word-recall comparison of changes between groups was not significant. Small groups, retrospective registration and numerous exploratory outcomes limit confidence.
The manufacturer supplied supplements and supported some testing; a senior author disclosed a manufacturer advisory role. An older trial found no cognitive benefit with or without strength training, using 56 enrolled women and 47 completers. [2]
UncertainDoes it improve thinking in healthy, rested adults?
A preregistered 2023 trial tested 123 adults, approximately half vegetarian. Each participant received creatine and placebo in separate periods, with 5 grams daily for six weeks per condition. Participants and researchers were blinded to the supplement. [3]
There was a small working-memory signal, but neither primary test reached the usual statistical threshold. Additional tests showed no benefit, and vegetarians did not benefit more than people who ate meat.
This leaves room for a small effect, but does not establish a dependable broad benefit. The trial had no separate washout period between conditions. Funding came from nonprofit organisations and a private donor; the authors declared no competing interests.
UncertainWhat do the positive meta-analyses actually show?
A meta-analysis combines findings from several studies. A 2024 analysis of 16 randomised trials, involving 492 participants, reported benefits for memory and some timed outcomes. It did not find significant improvement in overall cognition or executive function, which includes skills such as planning and managing tasks. [5]
However, a scientific assessment and a later commentary identified double-counting: related tests from the same participants were treated as independent findings. That can make results appear more precise than they are. [12] [6]
A 2025 correction clarified wording about attention and processing-speed scores. It should not be treated as resolving the double-counting concern. [7]
A separate positive memory meta-analysis also drew statistical criticism. The 2026 commentary reports that the authors’ reanalysis lost the significant overall memory effect, although an older-adult signal remained. [8] [9] [6]
UncertainIs the evidence stronger in older adults?
A review published in a 2026 issue included six studies and 1,542 older adults. Five reported a positive relationship with cognition, especially memory or attention. But only two tested supplementation; four estimated creatine intake from diet. [4]
Dietary associations do not show that taking a supplement causes improvement. Three studies were rated poor quality, two fair and one good. The review received Canadian public funding and declared no conflicts.
The findings justify better trials. They do not establish that older adults generally gain a noticeable cognitive benefit.
Plausible, not provenCan creatine reduce the effects of sleep deprivation?
A 2024 randomised, double-blind crossover trial tested 15 healthy adults during sleep deprivation. A single dose of 0.35 grams per kilogram of body weight improved selected cognitive outcomes and changed measurements of brain energy metabolism. Public research institutions funded the study; an author disclosed commercial relationships outside creatine. [10]
A 2026 follow-up tested 29 adults with a single dose of 0.2 grams per kilogram. It reported less deterioration on selected reasoning, processing-speed and vigilance tasks. [11]
Both studies are preliminary, with fewer than 50 participants, and came from the same research group. These experimental doses are not a recommendation for routine use or a replacement for sleep.
Not supportedIs creatine established as a reliable brain booster?
The European Food Safety Authority assessed a proposed cognitive-function health claim in November 2024. It concluded that a cause-and-effect relationship had not been established. [12]
This was a scientific assessment of the claim, not proof that creatine can never help anyone. It also predates the newer trials discussed here. The current evidence still does not support a confident promise of better everyday thinking for everyone.
What remains uncertain
- Everyday relevance: better scores on selected tasks do not establish noticeably better daily functioning.
- Who benefits: age, diet, sleep and exercise may matter, but dependable differences between groups have not been established.
- Exercise dependence: testing creatine without training does not establish equal benefits in exercisers and non-exercisers.
- Dose and duration: different experimental schedules do not establish an optimal routine for brain function.
The positive findings sit alongside negative results and important statistical limitations. Small sleep-deprivation studies should be kept separate from claims about healthy, rested adults. [14] [6]
Safety note
Creatine has a generally reassuring safety record in healthy adults at studied doses. Water-related weight gain can occur, and nausea, diarrhoea or other stomach symptoms have been reported. [13]
Safety evidence does not establish a cognitive benefit. The doses described in the studies above are experimental details, not an established brain-health dosing recommendation.
Key studies
On mobile: swipe sideways to view all columns.
| Source | What it found | Main limitations |
|---|---|---|
| Marshall, 2026 [4] Review; six studies, 1,542 older adults. | Mostly positive relationships with cognition. | Four observational studies; only two supplementation interventions. |
| Xu, 2024 [5] Meta-analysis; 16 trials, 492 participants. | Reported memory and selected timed-task benefits; no overall cognitive improvement. | Double-counting criticism undermines confidence in pooled findings. |
| Chun, 2026 [1] Double-blind trial; 64 completers. | Selected positive findings with and without exercise. | Exploratory comparisons, small groups and manufacturer involvement. |
| Sandkühler, 2023 [3] Double-blind crossover trial; 123 adults. | Small working-memory signal; no clear benefit across other tests. | Primary tests did not reach conventional significance; small effects remain possible. |
| Alves, 2013 [2] Double-blind trial; 56 enrolled, 47 completed. | No cognitive benefit with or without strength training. | Small groups and dropouts limit precision. |
| Gordji-Nejad, 2024 [10] Double-blind crossover trial; 15 adults. | Selected benefits during sleep deprivation. | Very small sample; unusual conditions and a high single dose. |
| Gordji-Nejad, 2026 [11] Double-blind crossover trial; 29 adults. | Less deterioration on selected tasks during sleep deprivation. | Small follow-up from the same research group. |
Bottom line
Creatine is a promising research topic for cognition, but a reliable improvement in everyday brain function remains unproven. Some studies report benefits without exercise, while others find none. Results during sleep deprivation should not be generalised to normal daily life.
Common questions
Can creatine improve memory if I do not exercise?
There are selected positive findings without exercise, but also negative trials. That makes a benefit possible, rather than dependable or proven. Whether exercise changes any benefit remains uncertain. [1] [2]
Do vegetarians benefit more?
A 123-person trial specifically compared vegetarian and meat-eating participants. Vegetarians did not benefit more. A greater cognitive benefit should not be assumed from diet alone. [3]
Is the evidence stronger for older adults?
There are promising findings, but a recent review relied heavily on observational dietary studies. Those studies cannot establish that taking creatine causes improvement. Better supplementation trials are needed. [4]
Can creatine replace sleep?
No. Small experiments suggest less deterioration on selected tasks during sleep deprivation. They do not establish that creatine replaces sleep or reliably improves rested performance. [10] [11]
What dose is proven to improve brain function?
The evidence does not establish a proven routine brain-health dose. Studies have used different amounts and schedules, with inconsistent results. The experimental doses in this article are not dosing advice. [12]
References
- Chun and colleagues, 2026. Effects of creatine supplementation with and without exercise and diet intervention on body composition, cognitive function, and markers of health in middle-aged and older adults. Randomised trial.
- Alves and colleagues, 2013. Creatine supplementation associated or not with strength training upon emotional and cognitive measures in older women. Randomised double-blind trial.
- Sandkühler and colleagues, 2023. The effects of creatine supplementation on cognitive performance: a randomised controlled study.
- Marshall and colleagues, 2026 issue. Creatine and cognition in aging: a systematic review of evidence in older adults.
- Xu and colleagues, 2024. The effects of creatine supplementation on cognitive function in adults. Systematic review and meta-analysis.
- Citherlet, 2026. Commentary on the Xu cognitive-function meta-analysis. Methodological criticism.
- Xu and colleagues, 2025. Corrigendum to the cognitive-function meta-analysis. Published wording correction.
- Prokopidis and colleagues, 2023. Effects of creatine supplementation on memory in healthy individuals. Systematic review and meta-analysis.
- Prokopidis and colleagues, 2023. Authors’ reply to the letter on double-counting and false-positive findings.
- Gordji-Nejad and colleagues, 2024. Single dose creatine improves cognitive performance and induces changes in cerebral high energy phosphates during sleep deprivation. Small crossover trial.
- Gordji-Nejad and colleagues, 2026. Single-dose creatine reduces sleep deprivation-induced deterioration in cognitive performance. Small crossover trial.
- European Food Safety Authority, 2024. Creatine and improvement in cognitive function. Scientific assessment of a proposed health claim.
- National Institutes of Health, Office of Dietary Supplements. Dietary supplements for exercise and athletic performance. Official safety overview.
- McMorris and colleagues, 2024. Creatine supplementation research fails to support the theoretical basis for an effect on cognition. Systematic review.
Disclaimer: This article is for general educational information only and is not medical advice. It does not diagnose, treat, or replace care from a qualified health professional. Always speak with a qualified health professional about personal health questions, medicines, pregnancy, medical conditions, or before changing treatment.
