Suppose there are 3 kinds of consumers grouped in terms of diet plan, then there would be the omnivores, the vegetarians and the vegans. Omnivores consume animal source foods and also fruits and vegetables. Generally they consume all sorts of food. Vegetarians evidently would be the vegetable and fruit eaters, while most animal flesh and animal goods are omitted in their diet. But, some vegetarians consume food products made of cow and/or chicken. On the other hand, vegans would be the type of vegetarian who are totally into fruits, vegetables, grains, legumes, nuts, as well as seeds.