Veganism (also known as strict vegetarianism or pure vegetarianism) is a philosophy and lifestyle that avoids using animals and animal products for food, clothing and other purposes. In practice, a vegan (an adherent of veganism) commits to the abstention from consumption or use of animal products, including meat, fish, and poultry, animal gelatin, honey, eggs and dairy products, as well as articles made of silk, fur, wool, bone, leather, feathers, pearls, nacre, coral, sponges and other materials of animal origin. Most vegans also avoid products that have been tested on animals. People become vegans for a variety of reasons, including ethical concerns for animal rights or the environment, as well as more personal reasons such as health benefits and spiritual or religious concerns.