Aim:In this study, we aimed to examine the frequency of food consumption and the supplement products taken for prevention purposes by those who have or have not had COVID-19 disease. Methods: This study was a single-center, case-control research. Volunteers were questioned about whether they used complementary medicine methods through nutrition to protect themselves from COVID-19. In addition, the questionnaire evaluating the consumption frequency of 51 different nutrients in 6 different food groups was questioned by face to face interview. Results: In this study, it was observed that there was an increasing trend in the number of theses on health literacy as a family medicine specialty thesis. The publication status of the theses on health literacy of family medicine residents who received specialization training at the university hospitals was lower than that of the family medicine residents at the training and research hospitals (p=0.015). When the health literacy scales used in the thesis research were examined, it was seen that the 3 most commonly used scales were TSOY-32, ASOY-TR, and Adult Health Literacy Scale. Conclusions: Patients with high consumption of fish, hard margarine and lard had less covid-19 disease, and the group with high consumption of red meat, oil seeds, dried fruits and vegetables, and simit had less hospitalization. There are a limited number of studies in the literature examining the relationship between COVID-19 disease and consuming food types. Further studies are needed in this regard.