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Rios, who passed four of the VADA-administered tests leading up to his match against Pacquiao, failed the urine test afterward. He tested positive for the banned substance methylexanamine, a stimulant that is commonly known as dimenthylamylamine or DMAA and has been used in dietary supplements.
"Efforts to reach Alex Ariza, Rios' fitness coach, were unsuccessful."
tsk tsk ariza
Rios, who passed four of the VADA-administered tests leading up to his match against Pacquiao, failed the urine test afterward. He tested positive for the banned substance methylexanamine, a stimulant that is commonly known as dimenthylamylamine or DMAA and has been used in dietary supplements.
"Efforts to reach Alex Ariza, Rios' fitness coach, were unsuccessful."
tsk tsk ariza

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