Veganism is both the practice of abstaining from the use of animal products, particularly in
diet, and the philosophy that rejects the commodity status of
animals. A follower of veganism is known as a vegan.
Distinctions are sometimes made between several categories of veganism.
Dietary vegans (or strict vegetarians) refrain from consuming animal
products, not only meat but also eggs, dairy products and other
animal-derived substances. The term ethical vegan is
often applied to those who not only follow a vegan diet but extend the
philosophy into other areas of their lives, and oppose the use of animal
products for any purpose. Another term is environmental
veganism, which refers to the avoidance of animal products on the
premise that the harvesting or industrial farming of animals is
environmentally damaging and unsustainable.