Popcorn packaging contains high levels of toxic chemicals

Many chemicals used at home and in various industries use per- and polyfluoroalkyl substances (PFAS). 

Several studies have traced these substances in materials used for packaging foods, such as microwavable bags and food containers. 

A new study shows that eating outside rather than at home is significantly associated with higher blood concentrations of all five of these PFASs, especially in women.

The greatest increases in concentrations (at up to 63%) were found with high popcorn consumption, and are probably from microwave popcorn bags. Lesser increases are seen with meals comprising fast food, pizzas and other eating places. 

Eating home-cooked food was associated with the lowest level of PFASs in blood probably due to the limited contact with food-contact materials containing these chemicals.