The BBC have gained access to just what food the people of Britain are putting into their shopping trolley each week, which includes 3 billion litres of milk and 1.34 billion kilos of potatoes a year. See? They love potatoes just as much as us lot. Alice Roberts investigates just how good the foods people eat are for them, and how to get the best from them, using cutting-edge scientific methods to uncover the surprising health benefits of the food we eat the most.