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Why Your Cortisol Is Highest When You Most Need to Sleep

Why Your Cortisol Is Highest When You Most Need to Sleep

25th Jun 2026

Most people think of cortisol as a morning hormone. Under healthy conditions, that’s largely correct. Cortisol peaks sharply within the first thirty minutes of waking – a surge called the cortisol awakening response – mobilizing energy, sharpening focus, and preparing your body for the day ahead. By evening, it should have declined to near its daily low point, creating the hormon …
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