Karan Rajan is an NHS surgeon and one of the biggest health and science creators on social media, with over 8.5 million viewers following his medical myth-busting and health advice videos. Dr Rajan has been featured in international news programmes and publications, worked closely with the UN, the WHO and the British Red Cross and delivered talks at Oxford University, Imperial College London, Birmingham University, Uber, Peloton, Tiktok and General Electric. He has recently launched a podcast, and written his first book, This Book May Save Your Life, which covers topics from sleep to gut health, ageing and brains.