Tomatoes: A tomato a day may keep heart disease at bay. Tomatoes are rich in potassium, vitamin C, and lycopene – a powerful antioxidant that protects heart and blood vessels against damage. Add them to your salads and casseroles, and cook tomato-based dishes like homemade soup. Strawberries, cranberries and raspberries: They are loaded with antioxidants, which have been shown to reduce the risk of heart attack by 32 per cent, by preventing the build-up of plaque in arteries. Consume one cup three times a week.