In this lively and inspiring interview, leading nutritional biochemist Dr. Libby Weaver reveals the nine must-know factors for successful and sustainable weight loss. Dr. Libby’s completely fresh approach goes beyond “the calorie equation”—how much you eat versus how much you move—and looks at weight loss through the perspective of biochemistry, nutrition, and, crucially, emotions. She explains how each person is different when it comes to weight loss, and how you may need to work on one or more of the nine factors she has discovered: calories, stress hormones, sex hormones, liver function, thyroid function, gut bacteria, insulin, the nervous system, and, of course, emotions. She makes it clear that you don’t have to feel helpless about your weight anymore, and that once you work out what’s really going on in your body, you can lose weight easily—without having to go on yet another diet!