Short answer
A little, mostly for older adults. Meta-analyses find small improvements in memory, with the clearest effect in people aged 66 to 76 and little in the young. Overall cognition and executive function didn’t improve. A 2025 pilot in 20 people with Alzheimer’s raised brain creatine and was linked to better scores on some tests, but it had no placebo group. Early evidence, not a treatment.
What the meta-analyses found
Prokopidis and colleagues pooled eight trials in 2023 and found memory improved overall, with a modest effect size of 0.29. In the subgroup analysis the benefit sat in adults aged 66 to 76, where the effect was larger, and there was none in people aged 11 to 31. Xu’s 2024 meta-analysis of 16 trials with 492 people found improvements in memory, attention time and processing speed, but no significant effect on overall cognition or executive function. Results varied a lot between studies.
The headline-grabbing studies
In 2024 a small crossover trial gave 15 people one very large dose of creatine, 0.35 g per kilogram, during 21 hours of sleep deprivation, and saw a smaller drop in some cognitive tasks. In 2025 a University of Kansas pilot gave 20 people with Alzheimer’s 20 g a day for eight weeks; brain creatine rose and some cognitive scores improved. Neither had a placebo group large enough to prove anything, and both used doses far above the 3 to 5 g a day used for muscle.
What that means in plain English
If you are older, sleep-deprived or under stress, creatine may give memory a small lift; it is not a nootropic for a healthy 30-year-old, and it is not an Alzheimer’s treatment. If you already take it for muscle, the brain effect is a possible bonus. Nobody should start it, or change a dose, for dementia without talking to their clinician.
Related questions
Does creatine help with brain fog?
“Brain fog” isn’t a measured outcome in these trials. The closest data, on attention and processing speed, shows small improvements.
How much creatine did the brain studies use?
From 5 g a day in some trials to 20 g a day in the Alzheimer’s pilot and a single 0.35 g/kg dose in the sleep study. Doses that high have not been studied for long-term safety in those groups.
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Published 2026-09-30 · Last checked 2026-09-30
Educational content, not medical advice. Made for the United States.