I took this a few summers ago after Freshman year in college wanting to lose about 10 pounds and also training for a marathon. This is right before the US government banned ephedra..they gave me energy in fact I could not take one after noon if i wanted any sleep that night.and they curve your appetite,so in that respect I lost the weight in 2 weeks.
The negatives far outweighted the positives. to say they made me testy and irratable is putting it nicely,I have not tried any since then,it's much easier in the long run just to take vitamins and eat smaller portions every few hours.
