https://www.cambridge.org/core/services/aop-cambridge-core/content/view/2A9776922A28F8F757BDA32C3266AC2A/S1368980017000234a.pdf/un_decade_of_nutrition_the_nova_

https://www.cambridge.org/core/services/aop-cambridge-core/content/view/2A9776922A28F8F757BDA32C3266AC2A/S1368980017000234a.pdf/un_decade_of_nutrition_the_nova_food_classification_and_the_trouble_with_ultraprocessing.pdf https://www.cambridge.org/core/services/aop-cambridge-core/c... See page 5 of the pdf.