As the food investigation series continues, Angela Rippon, Gloria Hunniford and Julia Somerville examine some of some of the latest fashions and fads to hit our plates and kitchens. They expose an unexpected downside to the nation's favourite fizz, as a dentist reveals the surprising effects prosecco can have on teeth. Also today, the team explores the rapid rise of the coffee machine increasingly finding a place in our homes. How does the taste compare with other, cheaper coffees? Plus, after one viewer had an unexpected reaction to a sourdough loaf, baking experts explain why not all the trendy sourdough breads sold in supermarkets are necessarily the real deal.