I am currently going through OMAD fasts every day and would occasionally (once every two weeks) do a 48-hr fast for longevity, metabolism, fat-loss, and autophagy effects. I have also been ingesting/drinking in rotation multiple types of caffeine such as yerba mate, guayusa, coffee, and green tea. Which of these caffeine types (or other caffeines) are most compatible with these prolonged fasts?