Hi kiwi33,

Thanks for the article. I have a fair understanding of the very basics of cortisol and ACTH but beyond that, I am at a loss. Read most of the article but skimmed the parts that were "over my head".

I know that high levels may be indicative of certain diseases, and low levels may be indicative of others. I understand the circadian rhythm and the effect on levels. Beyond that, I let the rest up to the docs that understand this bio-chemistry.

I did not sleep well last night. Do you think that may affect my test today?

I was fasting and the draw was about 7:50 this morning. Won't get the results until next week.

The repeat of the test was (as far as I am concerned), to satisfy my docs more than me. I am not the least bit concerned since I do not feel that I have any reason to think I have any of the diseases or symptoms of them, that are related to low (or high) cortisol levels. I would really be "shocked" to be told that I have anything to be concerned about regarding my cortisol level of <0.1 because I, too, think it was a lab mistake.

Just looked back at the last time my cortisol level was drawn and the result was 10.1 back in June of 2012. (It, too, was a fasting morning level.)

These were both serum levels, not urinary tests.

I really do appreciate you taking the time to provide the link for me.

Thanks so much for your posts.