Fecha de publicación: 22/05/2020 Fuente: WIPO "propolis" The present invention refers to combinations of food grade substances comprising purified Propolis, PalmitoylEthanolAmide (PEA) and N-Acetyl Cysteine (NAC) in different associations thereof in order to prevent and/or treat seasonal illnesses such as influence and common colds. The present invention also refers to methods to produce food supplements, functional foods, foods for special medical purposes or medicaments comprising said combinations.