I wonder if you have hit the nail on the head. I suffer from oral lichen planus, an autoimmune problems hence my fasting regime to try to reset my autoimmune system, however, I am prescribed betamethasone, which I have just found out, following your lead is a corticosteroid and may be affecting my cortisol levels..Which might fit in with my poor sleep, ongoing tiredness and difficulty in losing belly fat. . Do you have any inout on that? Is it possible?