Jimmy Doherty, Kate Quilton and Matt Tebbutt present some of their favourite investigations. In Ghana, Kate learns that pineapples contain a special enzyme that destroys dead skin cells in your mouth. And scientists have recently found a ground-breaking new use for this enzyme: treating burns victims. Back in the UK, Kate meets a former soldier whose horrific injuries are being healed with pineapple extract at the Queen Victoria Hospital in West Sussex. Jimmy investigates the catastrophic effects of not getting enough vitamin D. He meets a brave young boy suffering from rickets, and discovers the surprising origin of the fortified vitamin D that's added to many supermarket foods. And in leafy Lincolnshire Matt finds out how a UK business produces one and a half million bottles of elderflower cordial without employing a single flower picker.