The main difference between a vegetarian and a vegan diet is that vegetarians abstain from eating meat but may still consume animal products like dairy and eggs. In contrast, a vegan diet excludes all animal-derived products, including meat, dairy, eggs, and even honey. People often choose these diets for various reasons, including ethical concerns about animal welfare, environmental impact, or health benefits. Both diets can be healthy if well-planned, focusing on obtaining essential nutrients.