A recent study by the Duke-National University of Singapore Graduate Medical School showed that posting calories on menus has little effect on what customers buy. The 13-month study found that having calorie, fat and sodium information did not change public health behavior even at a time when obesity rates continue to soar. This is pretty scary stuff, especially as Washington battles over national health care. Maybe the nation could start taking better care of its health in the meantime. Just sayin’. Check it out.