It's the big rumor, Jon Jones last failed test may be explained by him taking cocaine that was cut with tainted Chinese creatine. Seems pretty far fetched, but Joe Rogan constantly brings that up. So, two things : is cocaine actually cut with creatine and is it a crappy Chinese version of it? First, creatine is one of the cheapest supplements and I'm really not sure it's worth it to pay extra postage to get a counterfeit version from overseas. Here are 3 pounds of good creatine for 40 bucks at GNC, imagine what amount and worth of cocaine you can cut with that... As, AFAIK, turinabol doesn't have any legal production, a tainted creatine would need to come from a hardcore underground lab, not just from a negligent factory. I then tried to find data about how often creatine is used to cut cocaine, and not just rely on internet hearsay. I found a British study that listed what was found in seized cocaine : out of 214 samples from British customs, none contained creatine. Out of 459 samples seized by the police, 46 had creatine (10%). We can say that cocaine can get cut with creatine, but only once it reaches the local markets, meaning it's most likely to get cut with a normal OTC product. The creatine excuse seems pretty unlikely to me. Lots of you will say "duh, of course it's bullshit", but I tried to gather some facts about that possibility. Also, IIRC, that rumor was never publicly issued by Jones' defense, though they could have discretely spread it to popular MMA figures like Joe Rogan.