The NFL and its union are trying to find a single source of dietary supplements so players know exactly what they're taking.
"We want someone to certify that what's in the bottle is what's in the bottle," Gene Upshaw, executive director of the NFL Players Association, said Tuesday.
"If we do that and a player tests positive, he didn't take our stuff."
"We want someone to certify that what's in the bottle is what's in the bottle," Gene Upshaw, executive director of the NFL Players Association, said Tuesday.
"If we do that and a player tests positive, he didn't take our stuff."
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