Nuti-Score is a European front of pack labelling scheme which ranks the healthiness of foods on a scale from A (most healthy) to E (least healthy). It's backed by governments in Germany and France. But it's opposed in Italy and Greece. Why? Could it be because it ranks many traditional foods in the Mediterranean diet as D or E? Or could it be because it ranks whole milk (C) as less healthy than Coke Zero (B)? Nutri-Score is flawed. And the evidence suggests that it may not be of much - or any - benefit for public health. It may be the world’s best example of how public health experts’ greatest expertise appears to lie in undermining their own credibility.