|In the past it was commonly believed that pizza was not really a healthy food. Part of the reason for this is that it was put in the same group as other fast foods, such as hamburgers and fries. This is a major misconception, as pizza can actually be a highly nutritional meal. One of the main ingredients of pizza is the tomato, which contains lycopene, a powerful antioxidant. Lycopene is known to help fight many different types of cancer. Studies have shown that people who eat pizza at least once a week were much less likely to develop colon and mouth cancer as well as stomach and lung cancer.