Gelatin is a protein made by boiling different animal body parts such as bones, tendons, and cartilage, which means that Peeps contain animal by-products, and therefore are not vegan-friendly. Luckily, Women's Health lists some alternative gelatin-free snacks vegans can enjoy, including Twizzlers, Sour Patch Kids, Jolly Ranchers, Skittles, and Nerds.