It isn't as potent as it used to be...the main ingredient is the caffeien...and there isn't anything that comes up as an illegal drug in a piss test....but if you are in a organized sport you may want to check with the stimulants regulations...
It is effective, but worked much better with the ephedrine...but it is not a
magic pill you need to use it wisely b4 cardio....and I wouldn't recommend more than one dose a day....It definitely helps, but only as long as you help it with a proper diet and exercise program...