Vegans avoid food that comes from animals, including meat, eggs and dairy products (like milk, cheese, and yogurt). A vegan diet is sometimes called a strict vegetarian diet. Some vegans also do not eat honey. Many vegans try not to use any other animal products, such as leather, wool, feathers, bone, or pearl. They also try to avoid buying and using products that have been tested on animals. They may believe in animal welfare and animal rights, and may campaign for these causes.