Vegan/ˈviːɡən/ Definition 1 of 2Pro Tip 1/3Ethical Choice Vegans often avoid animal products for ethical reasons, not just dietary preferences. Mark became a vegan because he opposes animal cruelty. Pro Tip 2/3Avoid Assumptions Not all vegans eat healthy foods – vegan diets can include junk food, too. Despite being a vegan, Emily loves vegan cookies and chips. Pro Tip 3/3Not Always Obvious Some non-vegan ingredients are not obvious, such as gelatin in candies or casein in bread. He checked the ingredients to confirm the bread was vegan.