A vegan diet excludes all animal-derived foods, including meat, poultry, seafood, eggs, dairy and any ingredients sourced from non-plant living beings such as honey and gelatin. But veganism generally goes beyond food. Most vegans embrace a lifestyle that involves avoiding any materials derived from animals, including leather, fur, wool and silk. Even household products, such as cosmetics and soaps, are excluded if they are made with animal-based ingredients or tested on animals. Only 3 percent of American adults categorize themselves as vegan, up from 2 percent in 2012.