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"Does cortisol age you" is really three different questions, and the evidence behind them differs in strength. What is shown about age-related change in the rhythm, what is associated with outcomes and by what design, what the field does not have at all — and what gets sold in that gap.
The stress response is a survival tool built for short bursts. Left switched on for months and years, it turns from protective to corrosive — and the wear-and-tear shows up in how you age.
Articles in this section are educational and are not medical advice, a diagnosis, or a prescription. Consult a qualified professional before acting on anything you read here.