What sort of diet helps people lose more weight?  Do overweight people lose more weight on a low-carbohydrate diet (like Atkins) or on a low-fat diet (like Weight Watchers and others)? A carefully designed study published in the current issue of the Annals of Internal Medicine answers that question.  The study enrolled over 300 obese adults and randomized them to a low-carbohydrate diet or a low-fat diet.  Importantly, patients with diabetes, high cholesterol and high blood pressure were exclud...