OR, the people on the low-carb, low-calorie diets lost the same amount of fat as the low-fat, low-calorie dieters PLUS the low-carb dieters lost six additional pounds of water weight, due to depletion of glycogen. However, any weight lost due to glycogen depletion will come back if/when one increases one's carb intake to what Dr. Atkins called the CCLM. The only way to know is to control for water balance, and I've checked multiple versions of this study on several news Web sites without finding out whether the study did in fact control for water weight loss.