**Update** Killer instinct maintains its original formula, but has the wrong labels applied! Please contact us for more info. Killer Instinct, the crazy high stim pre workout has been reformulated. Killer Instinct was one of the fastest selling pre workouts we have had in quite some time. High amounts of DMAA along with some dendrobium and ephedra made this pre workout a stim junky dream come true. As things happen in the supplement industry most things must change. This re-r