Maybe there's something to that horse meat diet after all.

UFC 141 drug test results are in from the Nevada State Athletic Commission (NSAC), who today confirmed that all fighters competing on the "Lesnar vs. Overeem" pay-per-view card, with the exception of Jon Fitch, were tested for illegal/banned substances.

Each competitor was screened for drugs of abuse like cocaine and marijuana, among others, in addition to a test for performance enhancing drugs (PED's) like steroids.

Results from these battery of tests all returned negative.

That should help put to rest much of the hoopla surrounding Alistair Overeem's drug test fiasco, which nearly prevented him from competing at the "Lesnar vs. Overeem" event at the MGM Grand Garden Arena back on Dec. 30, 2011.

"Demolition Man" was called out in a public hearing with the NSAC, one that forced Overeem to account for his inconsistencies concerning the time frame in which he took his steroid test as part of (what was supposed to be) a random screening.

While "The Reem" was scheduled for a hearing in front of the NSAC back on Dec. 12, ZUFFA was faced with the very real possibility that he could have been denied a license to compete, effectively destroying the much-ballyhooed main event with only two weeks until fight night.

Didn't happen.

The striking Dutchman satisfied their terms and was granted a conditional license -- prior to giving Lesnar an unconditional release following a first round technical knockout. The former WWE star called it quits during his post-fight speech.

To see how it all went down, check out our UFC 141: "Lesnar vs. Overeem" results round-up here.