A major new review says “yo-yo dieting” probably isn’t ruining people’s metabolism after all. Credit: Shutterstock Repeated weight loss followed by weight regain, often called "yo-yo dieting" or weight cycling, has long been viewed as unhealthy and potentially even worse than staying overweight. However, a major new review published in The Lancet Diabetes & Endocrinology argues that this belief is not backed by strong scientific evidence. In an invited Personal View article, Professor Faidon