Only one human study was used in the safety assessment by Elanco, and among the six healthy young men who participated, one was removed because his heart began racing and pounding abnormally.
Although few Americans outside of the livestock industry have ever heard of ractopamine, the feed additive is controversial. Fed to an estimated 60 to 80 percent of pigs in the United States, it has sickened or killed more of them than any other livestock drug on the market, an investigation of Food and Drug Administration records shows. Cattle and turkeys have also suffered high numbers of illnesses from the drug.
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