Everyone needs to eat more blueberries, plums, blackberries, broad beans and cherries, researchers say Sign up for our free Health Check email to receive exclusive analysis on the week in health Get our free Health Check email Get our free Health Check email Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice Even people who eat five portions of fruit and vegetables a day may be missing out on a key nutrient , researchers