Our guinea-pig presenter James Gallagher has been eating either extremely fast or excruciatingly slow to figure out what our eating speed does to our health. Dr Sarah Berry from Kings College London explains it’s not good news if you devour your dinner! And we get to the bottom of the headlines on cancer and the artificial sweetener aspartame. James and Prof David Spiegelhalter discuss why these cancer-scare stories keep on happening.

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Presenter: James Gallagher