https://www.sciencedaily.com/releases/2021/04/210405075904.htm > The researchers will present their results today at the spring meeting of the American Chemical Society (ACS). > Each year, the World Anti-Doping Agency (WADA) publishes a list of substances, including steroids, that athletes are prohibited from using. However, it can be difficult to distinguish an athlete's natural or "endogenous" steroids from synthetic "exogenous" ones administered to boost performance.