Introduction: The dissemination and adoption of healthy eating habits are crucial in promoting Public Health. Metabolic syndrome increases the risk of developing diabetes and cardiovascular disease, a leading cause of death. Viral hepatitis causes a high morbidity burden and a high incidence of hepatocellular carcinoma.Objective: This case-control aims to investigate the impact of eating habits, especially functional food, on biomarkers of Metabolic Syndrome, Hepatitis B/C. The bibliographic lack of research on this matter was the impetus for this study.Methods: 90 (aged> 18 years) patients participated in the study, equally distributed in the three diseases and 90 healthy controls. The cardiovascular-hepatic biomarkers evaluated were: HbΑ1c, CHOL, TG, HDL, SGOT, SGPT, ΝΤ-proBNP, U, and CR.Results: The main groups of conventional and selected functional foods were recorded through their frequency of consumption and their effect on biomarkers (Statistically significant level, p-value