Gloria Hunniford and Chris Bavin investigate the controversial diets that recommend cutting out entire food groups from what you eat. With the experts divided, could some of these quick-fix fads do you more harm than good?

The team also unpicks the startling headlines suggesting everything we have been told about the risk from saturated fats is wrong, and they test why we sometimes keep eating even when we are full. Is there an easy way to switch off your appetite?