According to a statement released by the UFC, Brock Lesnar has failed a second drug test and now reports are saying that the substance is the same as what was found in Jon Jones' failed test results.
The substance is called "clomiphene," an estrogen modulator commonly used to treat infertility in women. According to the anabolic-bible.com, "the elevation in both follicle stimulating hormone and (primarily) luteinizing hormone will cause natural testosterone production to increase. This effect is especially beneficial to the athlete at the conclusion of a steroid cycle when endogenous testosterone levels are depressed."
Jones tested positive for clomiphene and letrozole during an out-of-competition test and was removed from his main event bout at UFC 200 and later temporarily suspended.
Lesnar also tested positive during an out-of-competition test, but results were not available in time so Lesnar competed, and beat Mark Hunt (who by the way is going nuts on Twitter right now).
He has now failed a second test, this one having taken place on the day of the fight.