Hi.
I am not sure about supplements but I wanted add something about athletes of equal sporting and physical ability...
I was under the impression that there is no such thing otherwise people would post identical times all the time.
For me, the difference between one athelete of similar ability to another is their mind. How hard can they train, how hard can they maintain their focus, how hard can they push their bodies to the limit.Why else would some athletes be so superstitous - eg Tiger Woods and his red 4th day shirt, pre-competition routines, lucky underwear, lucky boots, etc etc.
This to me is where the difference lies. I have seen many people with natural ability go nowhere simply because they lack the mental discipline to succeed.
As for supplements, where do you draw the line? What is performance enhancing illegally and what is performance enhancing legally?