A masking agent is a reagent used in chemical analysis which reacts with chemical species that may interfere in the analysis, while in sports it is used to hide or prevent detection of a banned substance or illegal drugs like anabolic steroids (which include natural androgens like testosterone) or stimulants.
A masking agent is a reagent used in chemical analysis which reacts with chemical species that may interfere in the analysis. In sports a masking agent is used to hide or prevent detection of a banned substance or illegal drug like anabolic steroids or stimulants. Anabolic steroids, also known more properly as anabolicandrogenic steroids (AAS), are steroidal androgens that include natural androgens like testosterone as well as synthetic androgens that are structurally related and have similar effects to testosterone. 
