There's a lot of athletes (Mir, Romero etc) popping for drugs and then claiming "tainted supplement". Is this a loophole in USADA? Or is it a real problem in the supplement industry?
Yoel popped for ibutamoren which has little to no performance enhancement benefits. USADA independently tested the supplement and confirmed that it was tainted.
Jon Jones' case is totally different as he popped for two drugs commonly used in post cycle therapy