Everyone from UFC 153 passed drug tests, MMA Junkie is reporting, except for Stephan Bonnar and Dave Herman.
Bonnar was flagged for Drostanolone, a cutting agent used to lose fat/water for a more ripped look. It was his second time being flagged for illegal steroids in his system; after his second fight with Forrest Griffin he was flagged for Boldenone.
Herman was flagged for Marijuana in his system. Earlier in his UFC career he was flagged for Marijuana before his fight in Texas with Mike Russow, which ending up with Herman removed from that card.