Becoming vegetarian isn’t always as easy as recognizing there is pepperoni on your pizza or bacon bits on top of your Brussels sprouts. Whether you’ve gone vegetarian for dietary or ethical reasons, you always have to be on the look out for the sneaky animal products manufacturers slip into seemingly safe food items. If there’s not chicken stock in your vegetable soup (very common at restaurants and in store bought brands), there’s gelatin in your marshmallows (so long Rice Krispie squares!). Here are 10 other foods that have got to go if you’re serious about an animal-free diet. 1. Parmigiano-Reggiano Cheese For vegetarians, cheese can spruce up a plate of pasta, make a salad extra satisfying, or add oomph to a tray of appetizers. Unfortunately, for vegetarians, not all cheeses are, well, vegetarian. Some cheeses use an enzyme called rennet that is sourced from the stomach lining of goats and cows. This enzyme helps…