Your brain is 2% of your body weight but burns 20% of your total energy. Every joule arrives as ATP. You know what regenerates ATP? Creatine.
We've known this about muscles for decades. What took longer to appreciate is that neurons run on the exact same biochemistry — and your brain's creatine reserves are relatively limited.
The Data
Sleep-deprived subjects given 5g/day for 7 days maintained significantly better cognitive performance after 24 hours awake vs. placebo (McMorris, Psychopharmacology, 2006)
Vegetarians supplementing 5g/day for 6 weeks improved processing speed by 15-20% on Raven's Progressive Matrices (Rae, Proceedings of the Royal Society B, 2003)
Older adults showed improved long-term memory, forward recall, and spatial memory after supplementation (Rawson, 2008)
2018 meta-analysis across 6 RCTs: creatine improved short-term memory and reasoning, with strongest effects in older adults and people under stress (Avgerinos, Experimental Gerontology)
TBI protection: creatine reduced cortical brain damage by up to 50% in animal models — the Department of Defense is now funding multiple investigations
700+ human trials. No adverse kidney effects in healthy populations, including studies lasting 5+ years (Antonio, JISSN, 2017)
What To Do
Take 3-5 grams daily. Every day. No loading phase needed — brain uptake takes 4-8 weeks regardless. Consistency is the only variable that matters.
Buy monohydrate only. Creatine monohydrate absorbs at nearly 100%. HCl, buffered, and ethyl ester forms cost 3-5x more with zero proven advantage (Jagim, 2012).
Timing doesn't matter. Morning, evening, with or without food — the research shows no meaningful difference. Pick a time, make it a habit.
Tell your doctor you supplement. Creatine raises serum creatinine (a kidney function marker) — not because your kidneys are struggling, but because creatine naturally breaks down into creatinine. Context prevents false alarms.
Product Pick
Thorne Creatine — NSF Certified for Sport, micronized monohydrate, dissolves clean. At roughly ten cents a day, it's the highest-value supplement I take. I use 5g every morning in water.
Quick Hit
The kidney myth is dead. A 2017 JISSN review examined every clinical trial on creatine and renal function. No adverse effects. None. Including studies lasting 5+ years. If your kidneys are healthy, this is a solved question.
A dime-a-day supplement with 700+ trials, a spotless safety profile, and cognitive benefits that get stronger the older you get. The fact that it's still sitting in the bodybuilding aisle instead of next to the multivitamins is a branding failure, not a science one.
For a deeper dive into brain health and longevity, Peter Attia’s Outlive is essential reading.
Do you take creatine? Hit reply and tell me if you've noticed anything cognitive.
Creatine is one of the four pillars in The Essential Supplement Stack Guide — along with omega-3, magnesium, and vitamin D. Get the complete protocol with exact doses, timing, and stacking strategies for $9.99.