Does creatine help brain health and cognition?

What the evidence shows

The evidence includes a limited number of small, heterogeneous trials. Studied amounts ranged from about 2.2 to 20 g per day over several days to several months, and a separate 2026 crossover trial tested one acute 0.2 g/kg dose during sleep deprivation. These studies do not identify a reliable personal cognitive regimen.^{[1], [2], [3]}

Pooled trials found a small memory effect

Two meta-analyses of randomized controlled trials reported small improvements in memory with creatine compared with placebo. The standardized mean differences were approximately 0.29 and 0.31.^{[1], [2]}

One review rated the certainty for memory as moderate. The effect was statistically significant but modest, and trial results varied substantially.^{[1], [2]}

The effect appears stronger in older adults

In one subgroup analysis, adults aged 66 to 76 showed a larger and statistically significant memory benefit, while younger participants aged 11 to 31 did not show a significant change.^{[1], [2]}

A second analysis also suggested that some clinical and middle-aged subgroups may benefit more, but these subgroup findings were based on relatively few studies and should not be used to predict an individual response.^{[1], [2]}

Memory is not the same as cognition overall

Pooled analyses did not find a significant effect on overall cognitive function or executive function. Signals for attention and information-processing speed were rated low certainty.^{[1], [2]}

The current evidence is therefore better described as a possible limited memory effect than as a broad cognitive-performance enhancement.^{[1], [2]}

Acute sleep deprivation may be a special cognitive-stress case

A 2026 randomized, double-blind crossover trial in 29 healthy adults found that a single 0.2 g/kg dose of creatine monohydrate was associated with less deterioration than placebo on several cognitive tasks during 21 hours of sleep deprivation. The reported effects were modest and task-specific, including logic, numerical performance, language-processing speed, and psychomotor vigilance.^[3]

This does not establish a routine cognitive dose or a benefit during normal sleep. The study was small, short-term, and tested one weight-based acute dose under an artificial sleep-deprivation protocol, so it is better treated as an emerging stress-condition signal than as evidence for general cognitive enhancement.^[3]

The studied protocols varied widely

Across the included trials, amounts ranged from roughly 2.2 to 20 g per day and intervention lengths ranged from several days to several months.^{[1], [2]}

That range reflects heterogeneous experiments, not proof that all amounts are equivalent or that a high amount is more effective. The meta-analyses do not establish a best dose or timing strategy for cognition.^{[1], [2]}

The evidence base remains small

The pooled conclusions rest on a limited number of randomized trials with modest participant counts, low-to-moderate risk of bias, and substantial statistical heterogeneity.^{[1], [2]}

Larger and more rigorous trials are needed to confirm who benefits, which cognitive domains respond, and whether any effect persists over longer periods.^{[1], [2]}

A memory signal is not treatment of cognitive disease

The meta-analyses mainly summarize tests of cognitive performance. They do not establish prevention or treatment of dementia, depression, traumatic brain injury, or another neurologic condition.^{[1], [2]}

People with cognitive symptoms or diagnosed neurologic disease need condition-specific medical assessment rather than extrapolation from small healthy-adult trials.^{[1], [2]}

General safety conclusions have boundaries

Creatine kidney-safety findings are reassuring in generally healthy adults at studied amounts and durations, but do not cover pre-existing kidney disease. Higher cognition-study amounts should not be copied into a personal protocol without context.^{[1], [2], [4], [5]}

The evidence also does not establish safety in pregnancy or breastfeeding for alternative forms.^[6]

Read the supporting evidence summaries

The linked research pages provide study populations, formulations, doses, outcomes, and limitations in greater detail.

• Creatine and Cognition →
• Creatine for Older Adults →
• Creatine and Kidney Function →

Related questions

• Does creatine help older adults?
• What creatine doses have been studied, and is loading or cycling required?
• Is creatine safe for the kidneys?