I love me some jacked by the way best bang for the buck i've found next to reset A.D. but my question is no matter how much i use jacked i never seem to build up a tolerance for it. is there a specific reason for this? normally with products like no xplode or the one from controlled labs... can't think of the name right now i had to take breaks from it because i didn't get the effects after a while. i'm on my 2nd straight tub of jacked and it works just as well as the same day. if anybody has any info let me know. thanks guys