Rangan Chatterjee is a British doctor, author, and broadcaster. He is best known for his work in the field of lifestyle medicine, which focuses on the use of lifestyle changes to prevent and treat chronic diseases. He is the author of several books, including The 4 Pillar Plan, The Stress Solution, and Feel Better in 5. He is also the host of the BBC One series Doctor in the House and the podcast Feel Better, Live More. He has been featured in numerous publications, including The Guardian, The Times, and The Telegraph. He is a passionate advocate for lifestyle medicine and its potential to transform healthcare.