Scientists have discovered that foods that are rich in flavonoids such as blueberries and dark chocolate can keep you looking young and wrinkle-free. The flavonoids found within the foods help rejuvenate the DNA in our cells as they start to lose telomeres, which work to protect the cells from the ageing process. By adding these foods to your diet, you can slow, and even reverse, the ageing process in older cells within just a few hours.