I am relatively new to triathlon, having picket it up after a couple of stress fractures. I come from a running background, and was suprised by the overwhelming amount of performance enhancing supplments in the sport. It seems every time I pick up a tri. magazine, there are articles and ads proclaiming the remarkable benefits of another blend of "enhancers." I have always been one to down an espresso before a long effort and use gels with a little caffine, and recently have gone as far as trying out a bottle of "5 hour energy" which contains taurine and some other ingredients.