How do cortisol levels change in response to stress?

Dr. Holly Lucille - How do cortisol levels change in response to stress?

Occasional stress is a fact of life and may have some benefit. But it’s important to understand and watch for the downsides.

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Each year, millions of U.S. adults develop symptoms of SAD. Here’s what to do about it.

News of a mass killing can be traumatic—even if you aren't directly involved.

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