Their natural color means they're loaded with vitamins and antioxidants. Stadler recommends blueberries, red raspberries, and dark cherries as ideal fruits, and says you can't miss with any of the dark, leafy vegetables like spinach, kale, and Swiss chard. You can have them all year because, when it comes to nutrients, frozen is just as good as fresh.
While one highly publicized study suggested that those who are moderately overweight have slightly longer lifespans, other studies, such as this one at Oxford University, associated being moderately overweight with a decreased lifespan. The overweight, or obese, are said to experience lifespans 10 years less than average according to the Oxford study.