Food sold in shrink wrap, on cardboard trays or in paper containers might contain any of nearly 200 chemicals linked to breast cancer, a new study warns.

Researchers have identified nearly 200 chemicals used to make food packaging that could possibly increase the risk of breast cancer. Found in plastics and paper, some of the potential mammary carcinogens include polysterene and polyamide, which are used in styrofoam to-go containers from restaurants and black plastic spatulas.

Getting rid of these known or suspected carcinogens in our food supply is a huge opportunity for cancer prevention,” said Jane Muncke, co-author of the study.