Internal documents show the chemical company DuPont hid studies documenting the risks of a Teflon-related chemical used in the manufacture of hundreds of different types of food containers. The studies said the chemical Zonyl can rub off packaging and contaminate food with a potentially carcinogenic compound know as PFOA. A former DuPont chemical engineer backed the claim the company hid the studies. Referring to the chemicals, Glenn Evers told reporters: “They are toxic. They get into human blood. And they are also in every one of you. Your loved ones, your fellow citizens.” DuPont denied the allegations. The Environmental Protection Agency has been investigating whether DuPont has withheld information on potentially dangerous chemicals.