Two-time UFC competitor Ricardo Abreu has elected to retire after receiving a four-year suspension from USADA for a second failed drug test within a six-month period.
According to a statement from USADA, Abreu “tested positive for 19-norandrosterone (19-NA), the main urinary metabolite of nandrolone (19-nortestosterone) and other 19-norsteroids, above the decision limit of 3.4 ng/mL following an out-of-competition urine test conducted on December 21, 2016. In accordance with standard practice, the exogenous, or non-natural, origin of the 19-NA was further confirmed by sophisticated carbon isotope-ratio mass spectrometry (GC/C/IRMS) analysis, which can reveal the presence of synthetic anabolic agents.