That an intelligent adult or teen (CAH) could quite easily manipulate the level of anabolics or levels of stimulants before and during competition where sport is concerned, and there is not much difference between what you put in your mouth and what you can make your body "make" if you deprive it of a little of this or take a double dose of something before a race or competing.  Seems like a minefield to me.  Because the possibility is there for them to do that, you would get a lot of people complaining no doubt should they know a little more about CAH that’s for sure.  Especially other competing athletes.