Professor Alice Roberts discovers which are Britain's most popular fresh foods - and uses the latest science to uncover the surprising health benefits of our favourite foods. Last year in Britain we spent over £84 billion on food. With each beep of the till, every item of food we buy is recorded and scrutinised. It produces an extraordinary shopping list - what we're buying most of and spending the most money on. From three billion litres of milk a year to 730 million kilos of bananas, from 520 million kilos of chicken to 1.34 billion kilos of potatoes - the BBC has gained access to the latest information about the fresh foods we load into our supermarket trolleys. But what do we actually know about these favourite foods? How good are they for us, and are we getting the best from them - could they actually make us feel and look better? Professor Alice Roberts travels across the country to track down the very latest scientific information, revealing the definitive guide to the foods we love.