According to a report of Safer Chemicals, Healthy Families recently,nu-iron vs ferrous sulfate PFAS (per- and polyfluoroalkyl substances), a type of cancerogenic chemical has been detected in some food packages at fast food giants such as McDonald&39;ferrous fumarate 65 mg elemental irons and Burger King in the United States. [1] It triggered heated discussion on Chinese social media and later on Aug 10th, McDonald&39;s folic acid ferrous fumarateChina and Burger King China clarified that food emc ferrous fumaratepackages used in China completely conform to relevant GB standards and do not contstructure of ferrous gluconateain PFASs.