A vegetarian diet or a diet very low in meat has proven good effects on human health. It takes work to put together a healthy vegetarian diet that has everything the human body needs. When people decide to become vegetarian, they usually think carefully about what they eat and choose healthy food. They also go to the trouble of finding fresh food more often. Vegetarians eat lots of antioxidants and natural fiber. Scientists say vegetarians are less likely to have heart disease, some kinds of cancer, obesity and diabetes.