Does creatine help the brain?
A little. Across 16 trials, creatine improved memory and processing speed slightly, and it didn’t change overall thinking or planning. The biggest single result came during a night without sleep. Take creatine for your muscles and count the brain as a small extra.
You may have heard creatine called a brain supplement, something to take for focus even if you’ve never lifted. The idea is appealing because the mechanism is real. The results are smaller than the excitement.
What we’d do
Don’t take creatine for your brain alone. If you take 3 to 5 g a day for lifting, you may get a slight bump in memory as a bonus, and that’s about it. For a sharper brain, sleep does more than any scoop.
Why it might work
Your brain runs on the same energy molecule as your muscles, ATP, and it uses creatine the same way, as a quick backup to recharge it. The authors of a 2023 trial describe creatine as helping recycle ATP in both muscle and brain tissue.
The catch is getting it there. Your brain takes up creatine from the blood slowly, and the researchers behind a 2024 study note that it usually takes weeks of supplements to change brain levels. Your muscles soak it up far more easily.
It’s like a city that already has a backup generator in every building. Adding fuel helps most in a blackout and barely shows up on a normal day.
What 16 trials found
In 2024 Chen Xu and colleagues pooled 16 randomized trials with 492 adults aged about 21 to 76, including healthy people and people with diseases. All used creatine monohydrate.
| What they measured | What creatine did |
|---|---|
| Memory | Small improvement (effect size 0.31) |
| Attention time | Small improvement |
| Processing speed | Small improvement |
| Overall thinking | No change |
| Executive function (planning, switching tasks) | No change |
The gains were bigger in people with diseases, in adults 18 to 60, and in women. An effect size of 0.31 is small, the kind you’d measure in a lab and might not notice at your desk.
The biggest single trial
In 2023 Julia Sandkühler’s team ran the largest trial of creatine and thinking at the time. 123 people, about half vegetarians, took 5 g a day or placebo for six weeks each. They found evidence for “a small beneficial effect”. One memory test, repeating numbers backward, came close to a clear result, and a reasoning test and eight extra tests didn’t move. People reported side effects four times as often on creatine as on placebo.
Vegetarians, who start with less creatine, didn’t benefit more. More on that in do vegetarians get more from creatine.
The night without sleep
The clearest result so far came from a single large dose during a night without sleep, in a 2024 trial of 15 people. It held up thinking speed and short-term memory for hours. That dose was about 28 g at 176 lb, far more than a daily scoop. See creatine when you haven’t slept.
4 sources
- Xu C and others, The effects of creatine supplementation on cognitive function in adults: a systematic review and meta-analysis, Frontiers in Nutrition, 2024pmc.ncbi.nlm.nih.gov
- Sandkuhler JF and others, The effects of creatine supplementation on cognitive performance: a randomised controlled study, BMC Medicine, 2023pmc.ncbi.nlm.nih.gov
- Gordji-Nejad A and others, Single dose creatine improves cognitive performance and induces changes in cerebral high energy phosphates during sleep deprivation, Scientific Reports, 2024pmc.ncbi.nlm.nih.gov
- Kreider RB and others, International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine, JISSN, 2017pmc.ncbi.nlm.nih.gov
