Book excerpt: The main purpose of Body Weight Regulation is to educate the reader on the best strategy for losing weight and keeping it off long term. But after many years of managing obesity, the author has found that to achieve the best results, it is essential to understand the true nature of obesity. Thus this book first discusses the way the brain regulates body weight and how obesity cannot be caused only by poor lifestyle choices. It reviews the overwhelming evidence that obesity has a strong genetic or epigenetic basis and gives an evidence-based, detailed strategy on how to lose weight and keep it off . Body Weight Regulation discusses practical advice on how to structure meals that can be used during the weight-loss and weight-maintenance phases.