A groundbreaking investigation into the new science of stress hormones and their impact on our bodies - covering obesity, mental health, early years attachment, Type 2 diabetes, fertility and more - from one of the UK's leading hormone scientists and a Guardian journalist.

Dr Richard Mackenzie is one of the UK's foremost experts on glucose metabolism, insulin resistance and their interactions with stress hormones. Dr Mackenzie a leading researcher at Research Centre for Health & Life Sciences (Coventry University) and the Institute of Cardio-Metabolic Medicine (University Hospital Coventry and Warwick NHS Trust) and is internationally recognised for his work. He leads on metabolic health at a distinguished Harley Street clinic and has published more than 40 journal articles, mainly on insulin resistance and diabetes.