Abstract
Objective: To assess the level of knowledge about cardioprotective nutrition of elderly people attended at a municipal health unit before and after an educational intervention. Methods: This is a longitudinal study of a quantitative nature, carried out in a virtual environment through an instant messaging application, with pre-test, educational intervention and post-test, carried out with elderly women enrolled in a municipal health unit from the North region of Brazil. The instrument applied contained sociodemographic and economic variables, and questions related to cardioprotective nutrition. Results: 17 elderly women participated, with a mean age of 69.4±7.0 years. The percentage of correct answers in the pre-test was 67.23%, and in the post-test 92.10%. The intervention consisted of five actions mediated by videos, which after being watched, were discussed in the group created in the messaging application. Conclusion: The intervention favored a significant increase in the level of knowledge about cardioprotective nutrition, and thus, the development of interventions based on food and nutrition education is recommended to favor the dissemination of information among the elderly.