"A plant-based diet, which emphasizes fruits and vegetables, grains, beans and legumes, and nuts, is rich in fiber, vitamins and other nutrients. And people who eat only plant-based foods — aka vegetarians — generally eat fewer calories and less fat, weigh less, and have a lower risk of heart disease than nonvegetarians do
A National Cancer Institute study of 500,000 people found that those who ate 4 ounces (113 grams) of red meat or more daily were 30 percent more likely to have died of any cause during a 10-year period than were those who consumed less. Sausage, luncheon meats and other processed meats also increased the risk. Those who ate mostly poultry or fish had a lower risk of death."