![Substance profiles wit multi colored pills on black background](https://www.usada.org/wp-content/uploads/substance-profiles-post.jpg)
Substance Profiles for Substances Clarified on the 2017 Prohibited List
Each year, the World Anti-Doping Agency (WADA) publishes an updated Prohibited List of Substances and Methods, which outlines nine categories of substances and three categories of methods that are prohibited at all times, in-competition only, or in particular sports.