So apparently you also measure aldosterone and something called Renin. Renin is produced by the Kidneys. If Renin is low then the Pituitary would be tested and if it's high with low cortisol and low aldosterone then it would be adrenal insufficiency.
A low aldosterone (hypoaldosteronism) usually occurs as part of adrenal insufficiency; it causes dehydration, low blood pressure, and low blood levels of sodium and potassium. In infants with congenital adrenal hyperplasia, the infant lacks an enzyme needed to make cortisol; in some cases, this also decreases production of aldosterone. This is a rare cause of low aldosterone.
Ok and apparently during the first week of your cycle, if your a woman, your aldosterone is at its lowest. I think for me a lot of things are at their lowest during my menstrual period because I always get much more ill at that point with a large increase in symptoms.
Im sure most of you know this already, but I'm really slow and really forgetful since my illness and especially since my thyroid has gotten all weird on me. So I'm going to put what I can here that way I can come back to it and read it when I need it and maybe some one as forgetful as me can be helped by listing this here. Hopefully I remember that I posted this. ha