Veganism (also strict or pure vegetarianism) is a philosophy and lifestyle that seeks to exclude the use of animals for food, clothing, or any other purpose. Vegans do not use or consume animal products of any kind. The most common reasons for becoming a vegan are ethical commitment or moral convictions concerning animal rights, the environment, or human health, and spiritual or religious concerns. Of particular concern are the practices involved in factory farming and animal testing, and the intensive use of land and other resources required for animal farming.