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Vegetarianism is the practice of not eating meat. Vegetarians regard the flesh of all animals, including that of fish and poultry, as meat. Most vegetarians avoid eating meat because of moral or religious beliefs. They believe it is wrong to kill animals for food. Many vegetarians also think that eating meat is unhealthy.

Some vegetarians exclude milk and eggs, as well as meat, from their diet because these foods come from animals. Vegetarians are divided into three groups, based on their attitude toward milk and eggs. Lactoovo-vegetarians include milk and eggs, and foods made from milk and eggs, in their diet. Lacto-vegetarians do not eat eggs, but they drink milk and eat such milk products as butter and cheese. Vegans avoid milk and eggs and all foods made from these animal products.

A vegetarian diet must be well planned to replace the protein and other nutrients provided by meat. Most lacto-ovo-vegetarians and lacto-vegetarians can easily plan a healthy diet beca...