We now have a scapegoat for the obesity epidemic in the US - the USDA!  According to researchers at Albert Einstein College of Medicine, the national dietary guidelines advising Americans to eat low-fat may have contributed to the obesity problem.  People have replaced fat with sugar and carbohydrates which has increased Americans' total caloric intake and set them up for a host of metabolic disorders, say the study's authors, adding that low-fat foods are not diet foods.  Instead, your diet should emphasize vegetables, fruits, beans, unrefined whole grains, and mono- and polyunsaturated fats, as well as lean proteins.