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Americans ditch cheese after learning about Pfizer-linked ingredient | Stacy Liberatore, Daily Mail Pfizer developed a lab-made ingredient that is now found in roughly 90 percent of American cheese, and it does not have to be labeled. Many Americans were surprised to learn that roughly 90 percent of cheese contains a lab-made enzyme developed by Pfizer, and it does not have to be labeled. The ingredient, known as fermentation-produced chymosin (FPC), is a genetically engineered version of rennet, an enzyme used to coagulate milk during cheesemaking. While FPC has been used for decades, a viral social media post this week brought renewed attention to its origins, sparking widespread backlash and calls for greater transparency. On X, one user asked, 'How is this allowed?' and others vowed to stop buying American-made cheese, saying: '[A] boycott is the only way.' Another user shared: 'Unfortunately, I won't be buying American cheese anymore without reading the labels very car

In the United States, approximately 90% of hard cheese is made using a bioengineered ingredient known as Fermentation-Produced Chymosin (FPC). What is this ingredient? Historically, cheesemakers used animal rennet—a complex set of enzymes found in