In The Spark Factor, Dr Molly Maloof shares a gamechanging programme uniquely tailored to the biology of women that targets the mitochondria, the power source of the cells. As Dr Maloof shows, the intense, all or nothing approaches commonly used to optimise health – including sustained fasting, ultra low-carb diets and intense training – can be harmful, especially for women, because they create excessive stress in an already-stressed body, which can make us tired, weak and prone to illness.