A new article in Nature Medicine suggests that policymakers define ultra-processed foods negatively, by what they are not.[1] This approach should help to better identify the risks of these foods in the diet.[1] Ultra-processed foods make up an average of 40–60% of daily food intake.[1] These include products such as instant soups, packaged sweets, breakfast cereals, sweetened dairy desserts, sodas, frozen pizzas and ultra-perishable baked goods.[1] They contain substances that are not normally used in the home kitchen.[1] According to a series of articles in the Lancet, out of 104 analyzed studies, 92 confirm an increased risk of chronic diseases with their high consumption.[3] These foods reduce the nutritional value of the diet and contribute to obesity, type 2 diabetes, heart disease and depression.[3]