Taking creatine supplements at common doses for a week or longer does not change cognitive performance in healthy adults.
See the scientific wording
Creatine supplementation at doses between 2.2 and 14 g/day for 7 days or longer has no significant effect on cognitive function in healthy adults.
Backed by science
One low-scoring study supports this claim, so treat this as an early signal rather than settled science.
What the research says
1 study reviewedSupporting (1)
Systematic Review With Meta-AnalysisMeta-analysis2024
Scientists looked at many studies where people took less than 20 grams of creatine daily for a week or more, and found no improvement in memory, focus, or thinking. Even when they tried higher doses, only one tiny effect showed up once — and it didn’t happen at lower doses.
Contradicting (0)
No contradicting studies found yet
That doesn't mean it's settled — it just means no study has tested the opposite.
Quality-weighted scoring: we follow the GRADE framework — each study is rated High, Moderate, Low, or Very Low based on study design, methodology rigor, and risk of bias. A single high-quality RCT can outweigh several weaker observational studies.
Scores reflect study quality, not just count.
The brain already has enough creatine and energy to handle normal thinking tasks, so adding more creatine doesn't make the brain work better. Creatine helps make ATP, the brain's energy fuel, but healthy brains don't run out of energy during thinking, so extra creatine has no effect.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting study
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Taking creatine supplements at common doses for a week or longer does not change cognitive performance in healthy adults.
Mechanism
1 studyThe brain already has all the creatine it needs to make energy for thinking. Adding more creatine doesn't give the brain extra power because it isn't running out of energy in the first place.
The brain already has enough creatine and energy to handle normal thinking tasks, so adding more creatine doesn't make the brain work better. Creatine helps make ATP, the brain's energy fuel, but healthy brains don't run out of energy during thinking, so extra creatine has no effect.
Creatine crosses the blood-brain barrier via specific transporters
Creatine is phosphorylated to phosphocreatine in neurons by creatine kinase
Phosphocreatine donates a phosphate group to ADP to regenerate ATP during high-energy demands
Neuronal ATP levels remain sufficient during cognitive tasks without supplementation
Evidence from Studies
Supporting (1)
Community contributions welcome
Creatine and improvement in cognitive function: Evaluation of a health claim pursuant to article 13(5) of regulation (EC) No 1924/2006
Scientists looked at many studies where people took less than 20 grams of creatine daily for a week or more, and found no improvement in memory, focus, or thinking. Even when they tried higher doses, only one tiny effect showed up once — and it didn’t happen at lower doses.
Contradicting (0)
Community contributions welcome
Score Breakdown
No multi-axis breakdown available yet. The overall Pro / Against score above is the best signal.
- No clinical evidence is available; the score reflects mechanistic plausibility only.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Systematic Review and Meta-Analysis of Creatine Supplementation on Cognitive Function in Healthy Adults
Population: Healthy adults aged 18–65; Intervention: Creatine supplementation at 2.2–14 g/day for ≥7 days; Comparator: Placebo; Outcomes: Composite cognitive performance scores across memory, attention, and executive function domains; Duration: Minimum 7 days per trial, pooled across studies.
Double-Blind, Placebo-Controlled Trial of 14 g/day Creatine for 14 Days on Cognitive Performance in Healthy Young Adults
Population: Healthy adults aged 18–40; Intervention: 14 g/day creatine monohydrate; Comparator: Placebo; Outcomes: Standardized tests of working memory, processing speed, and verbal fluency; Duration: 14 days; Design: Double-blind, randomized, crossover or parallel-group.
Prospective Cohort Study of Long-Term Creatine Supplement Use and Cognitive Decline in Healthy Adults Over 5 Years
Population: Healthy adults aged 25–60; Intervention: Self-reported creatine use ≥2.2 g/day for ≥1 year; Comparator: Non-users; Outcomes: Annual cognitive testing across multiple domains; Duration: 5 years.
Cross-Sectional Analysis of Creatine Supplementation and Cognitive Test Scores in a Population-Based Sample of Healthy Adults
Population: Random sample of healthy adults aged 18–65; Intervention: Current creatine use (any dose ≥2.2 g/day); Comparator: Non-users; Outcomes: Single administration of cognitive battery; Duration: Single time point.
Case Report of Cognitive Function Before and After 6 Months of 5 g/day Creatine Supplementation in a Healthy Adult
Population: Single healthy adult; Intervention: 5 g/day creatine for 6 months; Comparator: Baseline cognitive performance; Outcomes: Pre- and post-intervention cognitive testing; Duration: 6 months.