Seth: creatine is 'applied battery physics' — mechanism, benefits, dosing, safety

Seth traces creatine from its 1832 discovery by Michael Eugene Chevron to a global surge after the 1992 Barcelona Olympics, then explains exactly how it works and what the evidence supports. Mechanism: orally ingested creatine survives stomach acid, is absorbed in the small intestine, and ~95% is taken into skeletal muscle via a specific transporter assisted by insulin. Inside cells creatine kinase converts creatine to phosphocreatine, which donates a phosphate to regenerate ATP when "ATP runs out in about 10 seconds" during maximal efforts — summed up as 'applied battery physics'.

Documented benefits: strongest and most consistent is increased strength, power, and short-duration performance; in healthy aging (sarcopenia) creatine plus resistance training reliably increases mass, strength, and bone density and reduces fall risk; cognition effects are meaningful primarily in older adults and those with decline but not robust in young healthy brains. Newer but promising uses include acute sleep-deprivation recovery with a single high dose (0.35 grams per kilogram, roughly 20–30 grams) improving cognition for hours. Alzheimer's data are preliminary: an 8-week feasibility pilot at the University of Kansas raised brain creatine ~11% with small signals on some cognitive tests — not proof of treatment and not the 30–50% headline claims.

Dosing and practical advice: the common 'five grams' dose arose from convenience after loading protocols; a loading phase is optional. Classic protocol: 20 grams/day split for ~a week then 3–5 g/day maintenance. A 1996 trial showed taking 3 g/day from the start reaches the same muscle saturation after 28 days with fewer GI issues. Seth's recommendation: 'three to five grams a day every day forever' for maintenance; use a one-off 20–30 g single higher dose only for sleep-deprivation use cases.

Safety: creatine does not damage healthy kidneys — confusion stems from increased creatinine (the lab marker). If you have kidney disease, consult your doctor. Water retention is intracellular (muscle swelling) not fat; high/loading doses can cause GI upset; lower daily doses or skipping loading reduces side effects. Overall: cheap, well-studied, and evidence-based for strength and aging, with promising but still-developing data for cognition and sleep-deprivation.