Girls at this age start to take an interest in the vegetarian issue. Since animal protein is consumed, this is not technically vegetarianism. A lacto-ovo vegetarian eats dairy and eggs, and a true vegetarian eats no animal products.
Adequate protein is the key issue.
If she does not eat any animal protein, she must use soy protein, which is the only complete protein in the plant world. Complementary proteins, such as beans and rice, and peanut butter and bread, are also suggested. Not all vegetarians eat healthful diets, and it does take altering shopping, cooking and eating-out habits. For teen-agers, it is too easy to eat processed, refined foods with lots of salt and fat. If pizza and pasta are her mainstays, she could develop a weight problem.