Jon Jones is adamant he did not take any type of steroids prior to UFC 200 after it was revealed he was flagged by United States Anti-Doping Agency (USADA) for Hydroxy-clomiphene, an anti-estrogenic agent, and Letrozole metabolite, an aromatase inhibitor.
While those banned substances aren’t performance enhancers, it is common knowledge they are effective for masking steroid use, according to Chael Sonnen.
And Alexander Gustafsson -- who lost a controversial decision to "Bones" at UFC 165 three years ago — says if it is proven that Jon was "juicing," then he’ll never be able to wash away the "cheater" label.