Angela Rippon and Kevin Duala untangle more mixed-up messages about our health, this time asking if it is possible to be fat and fit. Also, Angela tries acupuncture, which some reports now claim is no better for pain than a placebo. Could a remedy that has been around for thousands of years really have no benefit? And, with the average person spending more than two hours a day on social media, Steve Brown makes sense of conflicting reports that doing so can damage your mental health - or be a force for good.