I've tried lonnngg periods of no coffee, have tried loongg periods of eating fresh fruits and veggies, I have slept very well for long periods, I never take any sort of percription drugs or medicine. however, I'm way too skinny for my age and how much, and what I eat. Insulin has to be important here so I'm trying to slow my system down. This means no sugar, little little fruit, no carbs, mostly meat and fat. Actually, I know fat is the answer, its alreayd helping me. I would like other people to try and eat 60% of daily consumption be from beef lard. Annnd little fruit because its raising insulin too high. I crave sugar often, which is interesting, and I'm resisting eating sugar, and really feel like I need it. I think I wll eventually get a lot better adapting to not having sugar.