Am due to have a morning cortisol test tomorrow.
Question 1: Does caffeine affect it? Can I have a coffee beforehand basically?
Going through my notes I had a cortisol test in Sept 16. The result was 233 (range 140-690 nmol/L
). I remember at the time saying to my GP, if this is the time of day my cortisol is meant to be at its highest, then shouldn't it be higher than that? He replied emphatically that it was in range so it was absolutely fine. So....
Question 2: is the range above the range for 9am cortisol only...or for 24hrs? Is 233 low, normal or optimal for 9am?
Thanks in advance!