I think its because of his new buddies at the zia place he started going to after the hit and run. Those dudes seemed shady af to me always , probably gave him some shit that had something banned in it.
Or hes been cheating who tf knows.
He had suspicious levels before
Highlights
http://www.sherdog.com/news/news/Vi...Levels-Before-UFC-182-Highly-Suspicious-80631
“If they see a deviation in the T/E ratio of greater than 30 percent, there is something up. That’s a red flag,” Conte explained. “If you look at Daniel [Cormier’s] two ratios, they were .42 and .47; that’s about an eight percent deviation. If you look at the numbers for Jon Jones, his was basically an 80 percent deviation. His is suspicious and Daniel Cormier’s is not. It’s not just that he’s got very low [testosterone] levels, much lower than Daniel. Daniel’s are normal, his are extremely low.”
“These are highly suspicious for Jon Jones, in my opinion,” Conte said. “This is the reason that sophisticated anti-doping officials do target testing. So based on what we see here, my opinion is Jon Jones should be on a very short leash and should be random tested here until they sort out why he has these anomalies.”
That Jones’ levels were as low as they were should raise a red flag, according to Conte, because the use of performance enhancing drugs could be a potential culprit.
“Exogenous testosterone and other steroids in a period of time, depending on dosage and method of administration, can completely shut your testosterone and epitestosterone levels in urine to 0