A member asked:

Just wondering what it means to have low cortisol levels.

A doctor has provided 1 answer

Cortisol tests: In normal people cortisol goes up and down throughout the day, although it is higher in am than in pm. Therefore, it is hard to define what is "low". An afternoon cortisol of 5 may be perfectly normal. Adrenal failure is called addison's disease and is dangerous, but a random cortisol usually cannot be used to diagnose addision's. An acth stim test may be needed if this diagnosis is considered.

Answered 3/9/2018

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