do not use any supplements with ephedra, clenbuterol, or any other metabolism enhancers. If you have any pre-existing heart conditions it can seriuosly fuck you up. Also, do not use them if you have any thyroid problems.
Yeah, I agree with Sword..... However, my gut would tell me that you should steer clear of it.... There are alot of good fat burners out there that aren't Beta 2 drugs: Trex, Stimulant X...... Don't really wanna mess with your heart.... Not very smart....