This study tested a single hypothesis for why low-carb diets work. The diet provided is not "low-carb" in the sense usually meant (30 g of carbs or less daily).

This study tested a single hypothesis for why low-carb diets work. The diet provided is not "low-carb" in the sense usually meant (30 g of carbs or less daily). To extrapolate from this study that all low-carb diets don't work is not a reasonable conclusion.