Tomato is a superstar in the fruit and veggie pantheon. Tomatoes contain lycopene, a powerful cancer fighter they are also rich in vitamin C. The good news is that cooked tomatoes are also nutritious, so use them in pasta, soups and casseroles, as well as in salads. The British Thoracic Society says that tomatoes and apples can reduce your risk of asthma and chronic lung diseases.

Hot, spicy foods containing chillies or cayenne pepper trigger endorphins, the feel-good hormones. Endorphins have a powerful, almost narcotic, effect and make you feel good after exercising. Avoid creamy curries though if you are trying to lose weight as these are higher in fat than tomato or spinach based curries.