BSE Rule Re-Opened, Change Unlikely The U.S. Food and Drug Administration (FDA) is reopening the comment period for the interim final rule entitled "Use of Materials Derived from Cattle in Human Food and Cosmetics." Under the interim final rule amended in 2005, the small intestine of cattle can be used in human food, dietary supplements and cosmetics if a portion of it known as the distal ileum has been properly removed. But, according to FDA, since 2005, there have been scientific studies that found trace levels of infectivity in parts of cattle small intestine other than the distal ileum from animals with bovine spongiform encephalopathy (BSE), or mad cow disease.FDA does believe that the levels of infectivity are so low that th...