What is the ingredient in microwave popcorn that is bad for you?
                                
                                
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                                    5 min read                                
                            
                                According to a 2019 study, people who frequently eat microwave popcorn have significantly higher levels of PFAS chemicals in their blood. The primary ingredients in microwave popcorn that have caused health concerns are diacetyl, a buttery flavoring, and per- and polyfluoroalkyl substances (PFAS), a chemical found in the bag lining.