Whether you are a professional or age group athlete you must adhere to the anti doping rules of the World Anti Doping Agency (WADA).
To find out what substances are banned ( or just banned in competition) go to :
http://list.wada-ama.org/prohibited-all-times/prohibited-substances/
DON’T FORGET THAT IT IS YOUR RESPONSIBILITY TO KNOW THESE BANNED SUBSTANCES AND AVOID TAKING THEM, EXCEPT AS PERMITTED.
If found to have doped, whether deliberately or accidentally, not only could you be subject to a ban from competition but it could cause you embarassment if the media got hold of the information and also have other adverse consequences.