5-hbut some people wondered oveabout caffeine.es. the executive director of the center for science in the public interest said, overdoing caffeine alone is actually pretty difficult to do. someone would have to make an effort to consume 40 or so 200-mg caffeine tablets. or. about this much 5-hour energy. in a single day. we recommend. not more than two per day. yeah, when we first came out with the product. you know, i made sure of one thing. if my family wasn t going to use it. if it wasn t good enough for my family if it wasn t safe for my family. i m not gonna put it out there. i take it almost every day. and twice when i play tennis. this is our criteria that we have to be safe. if we re not willing to do it ourselves. we re not asking anybody else to do it. we re not gonna sell it. so, that s our approach to safety. that is a higher standard you can get.