From what I read, the adrenal exhaustion, is mainly caused by stress, not nutrients. When one is under chronic stress, the adrenal over produce hormones, that is what cause it to be "exhausted".
Did you read my original post? my levels are normal but not optimum according to Dr. Rind thyroid scale, this change happened over a night based on historical data, when my symptoms started which makes it the potential cause. I don't think I am hyperthyroid, but I suspect I might "develop" this condition, or get Grave's disease.
I already look holistically in my plan, my only "trouble" is thyroid, adrenal, metabolism as I am not familiar much with them, want to learn and understand better how to support them.