Study Overview
Citation: Forbes SC, Cordingley DM, Cornish SM, et al. (2022). Effects of creatine supplementation on brain function and health. Nutrients, 14(5), 921.
This meta-analysis pooled data from multiple randomized controlled trials examining creatine’s effects on various cognitive domains.
It provided the most thorough quantitative assessment of creatine’s brain benefits to date.
Key Findings
Cognitive Domains Affected
The meta-analysis found creatine supplementation significantly improved short-term memory performance, reasoning and intelligence scores, and cognitive performance under stress or fatigue.
Effects were smaller or non-significant for long-term memory and simple reaction time in rested individuals.
Population Differences
Vegetarians and vegans showed larger cognitive improvements than omnivores, consistent with the saturation ceiling hypothesis — individuals with lower baseline brain creatine have more room for improvement.
Older adults also showed meaningful benefits.
Dose and Duration
Studies using 5g daily for 4 or more weeks showed the most consistent cognitive benefits.
Shorter supplementation periods or lower doses produced less reliable results, suggesting brain creatine saturation takes longer than muscle saturation.
(Forbes et al., 2022)Practical Implications
- 5g daily minimum for brain benefits — lower doses may be insufficient for cerebral creatine saturation
- Allow 4-8 weeks — brain benefits take longer to manifest than muscle benefits
- Vegetarians are super-responders cognitively — the most dramatic improvements occur in those with lowest baseline stores
- Stress and sleep deprivation amplify benefits — creatine is most beneficial when the brain is under energy stress
Malaysian Relevance
For Malaysian students preparing for exams, professionals working long hours, and shift workers in healthcare and manufacturing, this research supports creatine as a safe cognitive support tool.
Malaysian vegetarians from Hindu and Buddhist communities are particularly likely to experience significant cognitive benefits.
Where This Fits in the Evidence
Forbes and colleagues’ meta-analysis matters because it moves the brain question from scattered single trials to a pooled estimate, and the pattern it finds is specific: creatine improves short-term memory and reasoning, with the clearest gains in people under stress or fatigue, while leaving simple reaction time in rested individuals largely untouched. That selectivity supports the saturation-ceiling idea — vegetarians, who start with the lowest brain creatine, show the largest improvements, exactly as you would expect if the benefit comes from filling a deficit. The analysis also flags a practical boundary the muscle literature does not share: cognitive effects were most consistent at 5 g daily for four weeks or more, implying the brain saturates more slowly than skeletal muscle. The broader evidence base is collected in our research library.
Sources and References
- Forbes SC, et al. (2023). Creatine and brain function. Nutrients, 14(5), 921.
- Kreider RB, et al. (2017). ISSN position stand. JISSN, 14, 18.
Study Limitations
- The included cognitive trials were often small and used different tests, which widens the uncertainty around any pooled effect
- Benefits were clearest for short-term memory and reasoning under stress; long-term memory and simple reaction time in rested people showed little or no effect, so the result should not be generalised to “all cognition”
- Much of the data come from short supplementation periods, leaving the optimal dose and duration for brain outcomes only roughly defined
- Population coverage is uneven, with vegetarians and older adults better represented in some analyses than others
What This Means for You
If your interest in creatine is cognitive rather than physical, this meta-analysis sets two practical expectations. First, dose and patience matter more than they do for muscle: aim for the higher end of the daily range and give it at least four weeks, because the brain saturates more slowly. Second, calibrate by who you are — the clearest gains showed up in vegetarians and in people who are stressed or sleep-deprived, while well-rested omnivores should expect a subtler effect, mainly in short-term memory and reasoning.
Further Reading
- creatine dosage guide
- creatine safety profile
- creatine for muscle building
- creatine for brain health
- how creatine works
- creatine loading phase
Sources & References
Full citations available in our Research Library.