Many comments so far responding with a reader's personal feelings on how all people should eat. This was a study of the effect of these diets on diabetics. As s

Many comments so far responding with a reader's personal feelings on how all people should eat. This was a study of the effect of these diets on diabetics. As such, it's not a huge surprise that low-carbohydrate, high-fat would come out ahead, given diabetes is a disease that prevents your body from properly processing carbohydrates. The authors here have made no claim whatsoever that anyone who is not diabetic would see any of these same effects and would even want to see these same effects (note that the only thing that might matter here to a non-diabetic is the LDL change, which was worse for the high fat diet). It's just too bad the participants that saw improvement still didn't stick with it and all benefits disappeared 3 months after the intervention was complete.