In a recent test of pork chop and ground-pork samples from six U.S. cities, Consumer Reports found low levels of ractopamine in almost one-fifth of the 240 pork products analyzed, as well as a range of other nasties – including several strains of antibiotic-resistant bacteria. Ractopamine is a growth promoter drug. It is widely used on intensive livestock farms in the U.S. because it increases the rate of weight gain and carcass leanness in pigs, cattle and turkey. It’s estimated that up to 80 percent of the U.S. pig herd is fed the drug every year. Of course, the drug doesn’t come without its costs.