The present study approaches the existence of other nutritional rationalities which are distinct from the biomedical one and are often included in the so-called traditional and/or complementary medicine. The hypothesis is that these other eating rationalities are relevant in themselves, deserve to be studied and may contribute to promote Food Security, health education and the enrichment of professional practices in Brazil's Sistema Único de Saúde (SUS - National Health System). The goal is to contextualize the interaction of these ideas and practices, and present the initial development of such hypothesis. The biomedical model, which is dominant in the area of nutrition, is revisited, and the need to broaden this perspective is defended. The "medical rationality" category is combined with the notions of food chains and models, in order to perform an initial mapping of the rationalities and food chains under focus.
Nutrition; Complementary therapies; Primary care; Food security