Does creatine improve memory or brain function?

Why do researchers study creatine and the brain?

Short answer: the brain uses creatine, but that does not prove a creatine supplement improves memory or thinking. Creatine helps cells recycle energy, and the brain uses energy continuously, which makes cognition a plausible research question. Studies have used different tests, populations and conditions, including healthy participants and people with illnesses. For the better-established exercise evidence, see the creatine profile.5

What did a controlled trial find?

In a 2023 double-blind crossover trial, 123 healthy adults took creatine or placebo during separate six-week periods; about half were vegetarian. On the two primary tests, the conventional comparisons were not statistically significant. A separate Bayesian analysis was consistent with a small possible benefit, while exploratory tasks did not show a clear improvement. Participants reported side effects more often during creatine than placebo. This study does not establish a noticeable everyday benefit or rule out a small effect, and its short follow-up cannot assess long-term outcomes.1

Can creatine make up for lost sleep?

A small 2026 double-blind crossover experiment tested creatine against placebo in 29 healthy adults who stayed awake for 21 hours. Participants completed thinking and vigilance tasks in both conditions. Researchers reported less deterioration on some tests after a single, unusually large amount of creatine. The study was financed by the research centre Forschungszentrum Jülich.

That is an interesting early result, not evidence that creatine replaces sleep. The study did not establish that a tired person can drive safely, perform demanding work normally, or recover from repeated short nights. It was small, tested one short period of sleep loss and did not establish long-term safety. The amount tested is not a recommendation; the study does not establish that it is appropriate or safe for an individual. If you are sleepy while driving, stop in a safe place and arrange rest or alternative transport.8

Why do reviews reach different conclusions?

A 2024 review of 16 trials reported a pooled improvement on some memory measures and rated that evidence moderate certainty, but found no statistically significant overall cognitive or executive-function benefit. It rated evidence for several other domains low or very low. A 2025 correction clarified that its non-significant attention and processing-speed findings referred to test scores, distinct from timing measures. Separately, a 2024 European Food Safety Authority panel evaluating a specific health-claim application concluded the evidence did not establish a cause-and-effect relationship for improved cognition. The reviews assessed evidence for different questions; neither proves every study is wrong or that the question is settled forever. A 2026 scientific commentary and the EFSA panel challenged the review’s pooling method: several related test results from the same participants were treated as independent observations, potentially making the estimate appear more precise than it is. This methodological criticism makes the pooled memory result less certain than the review’s own rating suggests.2347

What can a reader take from this?

A change on a brief test is not automatically better work performance, treatment of cognitive symptoms or prevention of dementia. Trials differ in participants, supplements, testing and duration, and a pooled estimate does not predict an individual result. Persistent or worsening memory difficulties deserve clinical assessment because there are many possible causes. Creatine can affect interpretation of some kidney blood tests; discuss existing kidney disease, medicines and products with a clinician. See creatine safety and kidney tests and how to store creatine.146