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Creatine isn't just for muscles. A growing body of evidence shows it enhances working memory, reduces mental fatigue, and provides neuroprotection — especially for vegetarians and the sleep-deprived.
Creatine is the most studied sports supplement in history, but its cognitive benefits remain surprisingly underappreciated. The brain accounts for 20% of total energy expenditure and relies heavily on the phosphocreatine energy buffer — the same system creatine supplementation enhances.
Under demanding conditions — sleep deprivation, complex problem-solving, stress, aging — brain ATP demand outstrips supply. The phosphocreatine system provides a rapid ATP buffer, and creatine supplementation increases brain phosphocreatine by 5-15%.
Rao et al. (2011): 5g creatine for 7 days significantly reduced the cognitive decline caused by 24 hours of sleep deprivation. Executive function, mood, and reaction time were all preserved.
Benton & Donohoe (2011): Creatine supplementation significantly improved memory in vegetarians — who have 20-30% lower baseline brain creatine due to dietary absence. This represents one of the clearest cognitive enhancement effects in the nootropics literature.
McMorris et al. (2007): 5g creatine improved random number generation and spatial memory in elderly participants, suggesting benefits for age-related cognitive decline.
Sakellaris et al. (2006): 0.4g/kg creatine in children with TBI reduced complications by 50% and improved recovery outcomes. The neuroprotective mechanism involves maintaining cellular ATP during ischemic/traumatic conditions.
| Population | Benefit Level | Mechanism | |-----------|--------------|----------| | Vegetarians/Vegans | +++++ | Lower baseline brain creatine | | Sleep-deprived | ++++ | ATP buffer when demand exceeds supply | | Elderly | +++ | Age-related mitochondrial decline | | Students/Knowledge workers | ++ | Sustained cognitive demand | | Meat-eaters with adequate sleep | + | Already near baseline saturation |