Evidence-Based Benefits
- Cognitive performance under stress — Rae et al. (2003) demonstrated that 5g/day creatine for 6 weeks significantly improved working memory and intelligence (Raven's Progressive Matrices) in vegetarians
- Sleep deprivation resilience — McMorris et al. (2006) showed creatine supplementation attenuated the cognitive decline caused by 24 hours of sleep deprivation, improving mood and complex cognitive tasks
- Brain energy metabolism — the phosphocreatine/creatine system is essential for rapid ATP regeneration in neurons; supplementation increases brain creatine stores by 5-10%, directly supporting energy availability
- Vegetarian cognitive benefit — vegetarians have lower baseline brain creatine levels due to dietary lack; supplementation produces larger cognitive improvements in vegetarians than omnivores
- Neuroprotection — creatine protects against excitotoxicity, oxidative stress, and mitochondrial dysfunction, with preclinical evidence supporting its use in traumatic brain injury (TBI) and neurodegenerative disease models