Vegetarianism has roots in ancient Eastern religions like Hinduism and Buddhism that promoted nonviolence towards animals. In the UK, around 5% of the population identified as vegetarian in the early 2000s. Major reasons for becoming vegetarian include health benefits like reduced risk of heart disease and cancer, as well as ethical concerns about animal welfare. Quorn and Veggie Happy are companies that produce meat substitutes and promote vegetarian options. The Vegetarian Society provides resources on avoiding animal products in common foods like bread, chips, and vitamins.