9 Surprising Things That Might Not Be Vegetarian

7 Cheese: some include rennet, which comes from animal intestine linings.
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Found in hard cheese like parmiagiano-reggiano and some cheddars, rennet consists of enzymes culled from the stomachs of sheep and other animals. Check the ingredient list on the package, as rennet-containing cheeses will mention it. Soft cheese, like mozzarella and cream cheese, typically are rennet-free.