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Being aware of what our bodies are telling us and how to deal with those challenges is what Dr. Oz says is most important. As well as being good for the heart, foods with tomato-based products can help alert our systems to what might be wrong, Dr. Oz says. Tomato sauce is part of so many foods it's just a matter of incorporating it into our diets more often. Dr. Oz says tomatoes contain lycopene which has been shown to fight cancer. But you can't just put a few slices in your salad to reap the effect. The tomato needs to be cooked in order to provide the most nutrients.