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cortisol

A hormone that helps the body respond to stress and to waking. Its level rises and falls each day: lowest around midnight and highest in the early morning.

Where it comes up

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Why do I keep waking up at 3am?

Waking at 3am and can't get back to sleep? Why it happens in the second half of the night, why it feels so bleak, and one small thing to try now.

About 12 minutes to read