The field of mind-body medicine is plagued by wild claims that mislead patients and instil false hope. But scientists in a range of fields are uncovering solid evidence that our minds influence our bodies far more profoundly than previously thought. The award-winning science journalist delves deep into the latest research and asks: are those who turn to alternative medicine deluded, or are they on to something? Can our thoughts, beliefs and emotions influence our physical health? Can we train our brains to heal our bodies?