In a shocking development for pizza lovers, the Food and Drug Administration is saying that there are chemicals in your pizza boxes that may cause serious health problems.

Three substances are being banned by the FDA, specifically for the waxy pizza boxes designed to prevent grease and water from soaking in. The substances all contain perfluoroalkyl ethyl which are classed as aspoly and perfluoroalkyl substances.

These chemicals are said to increase health problems and increase the risk of cancer as they can stay in the body for years. Common household items like wax pastry bags and microwave popcorn bags may also contain the substances.

Numerous health groups filed a petition against the chemicals leading to the ban which went into effect Monday.