[frankc]

Every study I have ever seen that put low carb diets head to head with other diets result in at worst, equivalent weight loss and usually more weight loss, with better other bioindicaters. Unfortunately many of these studies are brain dead in that they only weight body weight and not body composition, but given that other studies have shown that high protein diets lead to better muscle preservation, and a low-carb diet is generally higher protein than a low-calorie diet, I would bet money that even in studies where low-carb diets produce equivalent weight loss they have produced superior fat loss and superior muscle preservation.