Psychologist Kimberley Wilson and Dr Xand van Tulleken take a journey around the human body, asking what it can tell us about our innate capacity for change. In this episode, they explore serotonin - a chemical involved in everything from sleep to bowel function, appetite to blood clotting.
Xand and Kimberley find out why serotonin\u2019s reputation as the \u201chappy chemical\u201d is misleading, explore the interaction between serotonin and dopamine in sex drive, and hear about new approaches to treating depression using psychoactive drugs.
Producer: Dan Hardoon\nResearcher: Emily Finch\nExecutive Producer: Kate Holland\nA Whistledown production for BBC Radio 4