Dr Chris van Tulleken runs a groundbreaking experiment with the University of Surrey to see whether simply changing our mealtimes can help us all lose weight, whilst Gabriel Weston looks at whether diet products could actually be making us put it on!

Dr Saleyha Ahsan investigates the chemicals sprayed around our houses, and Michael Mosley gets to the truth about alcohol: can it be good for our health? Plus the story of a 12-year-old girl undergoing a new treatment for peanut allergy, and how to treat someone having an allergic reaction. Show less