Most U.S.Cheese Contains GMO Made By Pfizer ~March 12, 2024

Traditionally, cheese was made with just four ingredients: milk, salt, starter culture and animal rennet.

Today, there are four types of rennet used in the cheese-making industry: animal rennet, vegetable rennet, microbial rennet and a genetically modified version called FPC (fermentation-produced chymosin), made by Pfizer.