Biased Voluntary Nutri-Score Labeling Food labels are supposed to quickly inform consumers about the nutritional values of products. We provide evidence that in a system where labels are voluntary, they are systematically distorted. The probability of finding a label on a product of the category with the highest nutritional value is 51 percentage points larger than in the lowest category. 24 3 1007-1015 1007-1015 Walter de Gruyter GmbH