AdvertisementLots Of Antibiotics Are Used In Beef Production. McDonald's Vows To Change ThisDecember 11, 2018Allison AubreyfacebookEmailA customer holds a McDonald's Big Mac. The fast-food giant, one of the world's biggest beef buyers, has announced plans to use its might to cut back on antibiotics in its global beef supply. Environmentalists are applauding the commitment. (Christoph Schmidt/Picture Alliance via Getty Images)