user335184504 How quickly we feel tired or how rested we feel after we sleep so you don't want to take anything containing caffeine for a prolonged period of time he also might want to avoid taking it before you try to go to bed me and I just have to mention because it’s me that if you're consuming soda and coffee then you are a deep thrown your concerns about caffeine out the window but green tea is going tube a much better source of caffeine then the soda which contains a Benjamin added sugar in empty calories or the coffee which is also loaded probably with cream...