The United States Department of Agriculture has a long list of dietary guidelines available on its website. These can help vegetarians plan and construct a diet that will meet all their needs. Things like fortified cereals, veggie burgers and certain whole grains like quinoa, nuts like walnuts, and soy products can help round out a perfectly balanced vegetarian diet.
While no diet will prevent all diseases, the obvious health benefits of vegetarianism should be considered by all those who may suffer from the effects of the typical Western diet. Even cutting back on meat consumption several days a week may be a boon to better health, plus it can help save money, do a small part in helping the planet, and eliminate a lot of antibiotics and other chemicals from the diet.