The Journal

Longevity & Performance

The biomarkers and habits with genuine evidence behind healthspan, from muscle mass to the supplements people ask us about most.

Longevity medicine is at its best when it is boring: unglamorous habits, checked against real data, applied consistently. These articles cover the biomarkers and questions we are asked most often, starting with the single strongest predictor of resilience most people never measure.

Longevity Muscle is a survival organ: low muscle mass and mortality risk
6 Min Read

Muscle Is a Survival Organ

In 6,891 critically ill patients, low muscle mass more than doubled the odds of death. Why muscle matters for longevity, and what to do about it.

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Performance A measured scoop of creatine powder beside a glass of water
4 Min Read

Does Creatine Damage Your Kidneys?

Why creatine makes one blood number look higher, what 20 studies found about real kidney function, and when to check.

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