Pfft, you stole that from here:Green teas have about a quarter the caffine content, by liquid volume, of coffee. theophylline, which is stronger than caffine, and theobromine, which is slightly weaker than caffeine. Green teas contain two caffeine metabolites (caffeine like substances)
http://www.funadvice.com/q/are_rockstar_energy_drinks_good_for
And here I was thinking you're all smart and shit.