Thyroid UK

24 hr Urine Cortisol vs Cortisol Blood Test for Adrenal Fatigue

I live in Cyprus & it seems that saliva cortisol testing is not available. My results for the 24 hr urine cortisol test came back at 46.8μg/24 hr (4μg - 176μg) & I was told this was ok as it is within range. Can someone tell me if these results seem ok because I have all the classic symptoms.

I am due for a Cortisol Blood test in a couple of weeks' time. Will this give a clearer picture of what's going on with my adrenals? I read somewhere that if it is done at about 8am & the result is low, then it's likely I have adrenal fatigue.

Any advice is greatly appreciated : )

2 Replies


I think if early morning serum cortisol is low you would need to have a short synacthen test to diagnose adrenal insufficiency.


Thanks for the information & advice Clutter : )


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