Source: Mercola By Dr. Mercola While the beta-agonist drug Zilmax (Zilpaterol) has been used to promote muscle growth in American-grown cattle since 2007, news of the dramatic adverse effects of this drug didn’t hit mainstream news—and hence public consciousness—until late last year.1 In early August, 2013, Tyson Food Inc issued a statement saying it would … Continue reading Merck Continues Promoting Zilmax, Despite Cattle Losing Their Hooves