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Figs - Figs are arguably non-vegetarian as they contain at least one dead female wasp inside. It's a natural part of the fruit's pollination. No actual parts of the insect can be found inside as an enzyme completely breaks it down and transforms it into protein.

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Tortillas - Some contain lard to make it more buttery, so be sure to ask your restaurant and check the package.

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Baked beans - Most recipes, though not all, of baked beans call for bacon or ham hock. Heinz Beanz is both vegetarian and vegan, for example.

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Altoids - This popular brand of breath mints contains gelatin.

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Wine and beer -

Many brands of beer and wine, particularly British ones, use isinglass, a gelatin derived from a certain freshwater fish.

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Worcestershire sauce -

This fermented condiment has anchovies in it.

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French onion soup - Though it sounds vegetarian, French onion soup is traditionally made with beef broth.

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Non-fat yogurt - Many fat-free varieties contain gelatin—an ingredient derived from various animal body parts—to help retain its texture.

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Marshmallow - Marshmallows also contain gelatin. But gelatin-free varieties are available for those unwilling to forego s'mores.

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French fries - Fries are by definition vegetarian, but many restaurants use animal fat to fry them. McDonald's is just one example, and they've even been sued over it. However, the chain's fries are already vegetarian in other parts of the world.

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Refried beans - Many traditional Mexican restaurants make their refried beans with lard.

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Jell-O -

The main ingredient in Jell-O is gelatin.

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Vanilla ice cream - Many store-bought brands of vanilla-flavored ice cream contain the food additive castoreum.

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Rice Krispies Treats - They have marshmallows in them, which contain gelatin.

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Frosted Mini Wheats - Also contain gelatin.

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Cake mix - Many brands of cake mix use lard. Vegetarian mixes are available, though.

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Caesar salad - Caesar salad dressing generally includes anchovies.

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White sugar - Many sugar companies use charred animal bones to whiten their sugar. However, there are many companies out there that deliver vegan options. Just do a bit of googling and choose a brand you trust.

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Parmesan cheese - Parmesan cheese, as well as many other cheeses, is made with rennet, which are enzymes extracted from the stomachs of ruminant mammals.

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Foods labeled as heart-healthy -

Many foods that say "heart-healthy," such as orange juice, breakfast cereals, and milk, contain Omega-3, derived from fish.

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Olive tapenade - The traditional recipe of this appetizer calls for anchovies.

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Split pea soup - The traditional recipe starts with ham hock, but vegetarian options exist. Ask your server if you don't consume animal products.

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Pesto - Most pesto recipes call for parmesan cheese, which is traditionally made with rennet, an enzyme extracted from animals' stomachs.

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Candy corn - This Halloween classic contains gelatin.

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Red candy - Brightly-colored foods, particularly candy or drinks, contain a dye made from crushed beetle shells, generally labeled as carmine, crimson lake, cochineal, or natural red #4.

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Hard-coated candy - The coating in candy generally contains shellac, a shiny glaze produced by lac bugs. Shellac is also used extensively as a nail product.

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Roasted peanuts - Roasted nuts often contain gelatin to help the salt stick better. Check the label.

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Donuts -

Popular snack chains, including Dunkin' Donuts, use an enzyme called L. Cysteine, a substance that can be derived from avian feathers or pig trotters.

See also: The foods Americans miss the most when abroad

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