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Many people follow special diets in the U.S. For example, there are vegetarians, people who do not eat meat or fish. Then there are vegans, also called strict vegetarians, who do not eat any animal products at all, including butter, cheese, eggs or milk. A small number of vegetarians belong to a group know as fruitarians. These people only eat foods for which the picking or harvesting does not cause injury or death to the plant. For example, pears or apples can be picked without killing the tree, while harvesting carrots or potatoes will always kill the plant. Many believe--and some scientific evidence seems to support the claim--that a vegetarian diet is the healthiest kind of diet. However, most nutrition scientists say that in order to stay healthy on a vegetarian diet, you must eat a wide variety of vegetables and grains, not just food from one or two categories. TYPES OF VEGETARIANS Ovo vegetarian - eats eggs; no meat Lacto-ovo vegetarian - eats dairy and egg products; no meat Lacto vegetarian - eats dairy products; no eggs or meat Vegan - eats only food from plant sources Pesco vegetarians - eats fish but no other meat Pollo vegetarians - eats poultry but no other meat