I'm using this stuff called JACK3D right now and Id say it works fairly well. Gives me the energy to push out the heavy reps but its the after affects that are starting to make me reconsider ever touching this stuff again. Problems: 1.After the workout I'm a hopped up crazy man for the next 4 hours or so. If someone said dude, there's illegal substances in that stuff I wouldn't be surprised at all. I'm not sure what ingredient that's in it that makes me feel like I'm the fucking Hulk but damnn. I would defiantly recommend taking a scoop be4 a fight if anything. 2. Sex drive is completely gone. I mean nothing. I forget why women are even needed when Im on that shit. Then after about 3 days without taking it, I awake back to the vagina slave I started off as. I literally stopped taking this stuff because my gf was like WTF, why dont you wanna fuck me. Similar stories? Or am I alone in this?