Nova groups for food processing A classification in 4 groups to highlight the degree of processing of foods. In the report "The UN Decade of Nutrition, the NOVA food classification and the trouble with ultra-processing" (pdf, pdf), Carlos Augusto Monteiro, Geoffrey Cannon, Jean-Claude Moubarac, Renata Bertazzi Levy, Maria Laura C. Louzada and Patrícia Constante Jaime advocate for the adoption ...