in all honesty, the best thing for your age is going to be a clean diet... and a good amount of time at the gym... your body is friggen going crazy with the amount of hormones you are producing.. and you can use that to your advantage. cissus and cAMPH work very well, but if i could go back in time to my teens, but keep the info that i know now about these two products.. i would not take them for fear of hindering my body's own ability to produce what i need...
i would however... have no problem in saying.. green tea, ALCAR, fish oils, would be worth your time and money.... hell they are worth anyones time and money and should be given out free along with toilet paper, tampons, tooth brushes/paste