Protocol
creatine · creatine monohydrate
Creatine has one of the largest human trial literatures of any supplement, and the muscle-related findings are genuine clinical evidence: randomised trials consistently show increases in lean mass and strength when creatine is combined with resistance training, including in older adults, which is directly relevant to sarcopenia and healthspan. Cognitive effects are far weaker and inconsistent, largely confined to sleep-deprived or stressed states rather than healthy rested adults. Critically, no trial shows creatine extends lifespan or slows biological ageing in humans; the longevity framing is mechanistic extrapolation from its role in cellular energy metabolism, not an outcome that has been measured. Claims about mitochondrial output and metabolic health are mechanism-level. A caveat on this profile specifically: I was unable to run live literature searches in this session, and the clinical characterisation above rests on one retrieved clinic-authored source plus prior established knowledge, not on primary trial documents I opened. Treat the strength and lean-mass claim as well-supported but independently unverified here.
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What it is
Creatine monohydrate is a synthetically produced form of creatine, a compound the body also makes from amino acids and stores mainly in skeletal muscle, where it buffers ATP regeneration during short, high-intensity effort. In longevity practice it is used as a daily oral supplement, typically alongside resistance training, with the aim of preserving muscle mass and strength with age. It is also claimed to support cognitive performance and mitochondrial energetics, claims that rest on a much thinner evidence base than the muscle endpoints.
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Sources
Every entity profile on variis is sourced. Not medical advice.