KLouis

It's not the answer but it may be helpful! Many years ago, a good friend of mine who would spend half his time flying across all continents was getting tired of not being able to sleep in a regular way. The solution he chose was to stop drinking regular tea and coffee switching to herb tea and decaf. About two-three years later he was offered the DG position of a large international agency in Europe and he moved from the US. Before starting his new job he had to take a thorough physical exam; the doctor found him in good health, he nevertheless asked him how his sleep was. My friend replied that he had irregular sleep that had not improved, although he had completely quit caffeine (he said the latter in a proud way). The doctor's simple reaction to this was "...then start drinking real coffee again"!