Separate question is "should I take this in order to be able to perform in a way that I could not without it, even though it is not banned/illegal, or would taking that deliberate action put me over a personal, ethical line?"
If it's food, you're probably safe, if it's some drug that's not specifically listed but is designed to say, build muscle, then you are in breach of wada and will fail a drug test if they detect it and you can't lawyer your way out.
Separate question is "should I take this in order to be able to perform in a way that I could not without it, even though it is not banned/illegal, or would taking that deliberate action put me over a personal, ethical line?"