Secrets of Your Supermarket Shop S04E01 - Snacks and Treats

Sian Williams, Stefan Gates and Nisha Katona return to lift the lid on production and sale of supermarket food, beginning with an investigation into snacks and treats. With the help of the Hill family, Sian asks whether it is possible to tell the difference between branded biscuits and the cheaper versions, while Stefan examines how junk food affects good gut bacteria.