i wonder if it has to do with the fact that i live in canada. i know some american pre workout supplements have to be changed before released on the candian market due to certain ingredients. I also have a very good tolerance to stimulants. Right now for my pre workout i take 2 scoops of allmax muscle prime and one scoop of no shotgun. And its ok but nothing amazing lol . I need to get my hands on some jack3d. will that get across the border to me i wonder.