‘I won’t send off my poo’: Dr Chris van Tulleken on ultra-processed food, his Christmas lectures and gut analysis

Exclusive: Author to explore ‘really fun’ science of food and diet for Royal Institution’s annual broadcast

Walk into any supermarket and the choice of foods is enormous, from brightly coloured breakfast cereals to pre-packed lasagnes.

But for many, deciding what to add to the basket has never been harder, with concerns growing over industrially produced items.