Can a 24 urine cortisol test reliably rule out adrenal insufficiency? At what cortisol level?

Most helpful test. The 24 urine cortisol testing is one of the most sensitive tests and gives a better picture over the course of the day instead of just getting a sample from you a single time. There are blood tests and saliva tests which can be falsely be falsely elevated or falsely low depend L depending on your other medications and the time the test is performed. The best is to see an endocrinologist to help.

Related Questions

What does a normal 24 hr urine cortisol indicate a year after being diagnosed with adrenal insufficiency? Do I still need my adrenals monitored?

It depends. "normal" here actually means it is at least the level of 95% of the population, but given that much of the population suffers from adrenal fatigue normal does not mean optimal. And while the average for 24 hours is "normal" there may be some times of the day when it is lower than it should be. I feel your symptoms are more important than any single test result- see http://www.Adrenalfatigue.Org/. Read more...
Yes. A 24hr urinary free cortisol is a screening test for cushings syndrome. It is not usually used in adrenal insufficiency. Cushings syndrome is an overproduction of cortisol/steroids as opposed to the underproduction of cortisol/steroids in adrenal insufficiency. Read more...