My husband takes all kinds of supplements and nootropics in an attempt to improve his brain function..myself... I just want to function..period... I am not a morning person, by any stretch of the imagination... It usually takes coffee or English breakfast plus half the morning for me to feel as if I am awake... we started buying this with other products directly from the natural stacks website... he takes the other stuff, we both take the smart caffeine... I take two a day right after I get up...it has definitely reduced the amount of time it takes me to get up.... I still have the occasional day when no amount of caffeine helps, do not get me wrong this is not a magic pill... but it does help significantly on a regular basis..