Complex sentence: It is approved in the United States for use in swine for up to 42 days before slaughter, but in 2016, the United States Food and Drug Administration moved to ban its use in pork, citing a potential cancer risk to humans.
Split into simpler sentences: It is approved in the United States for use in swine for up to 42 days before slaughter. In 2016, The United States Food and Drug Administration moved to ban the substance from use in pork, citing a potential cancer risk to humans.