Wine , tortillas or even vegetable soup are obviously vegetarian, right? Well, if you're on a plant-based or vegan diet , you might want to double-check. Some foods that are seemingly animal-free might not actually be. Surprising ingredients, including animal byproducts, sneak into everyday staples without much warning.

We spoke with food and drink experts to learn about 10 common foods that aren't always vegetarian-friendly. Here's everything to know.

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Cheese

Real Parmigiano-Reggiano isn't a vegetarian product, due to the use of rennet during production. Parmigiano Reggiano Consortium

Alarmist headlines like to specifically call out Parmigiano-Reggiano

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