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The study aimed to evaluate the breakfast (BF) of the Brazilian low-income population, analyzing cultural aspects, such as the habit of consuming regional foods and the BF food identity markers. This cross-sectional study used a sample of 1872 low-income Brazilians. For the food consumption analysis, three 24&ndash, hour dietary recalls were used. For the qualitative analysis of the BF, we used three classifications: standard, full, partial, and without BF. Also, BF was considered as regional when at least one regional food (contained in a predefined list of regional foods) was consumed. For the analysis of BF's food identity markers, we evaluated all food groups and their frequencies. Of the 5616 possible BF meals available for the three days of consumption, 17.3% were skipped, a low percentage. A total of 4642 BF examples were analyzed. Standard type BF was prevalent in all regions, and full BF was rarely consumed by participants. Women during the weekend skipped BF less often. Out of all five Brazilian regions, the ones with the highest consumption of regional foods were the Midwest (46.6%) and the South (45.9%). The highest frequency of consumed foods in BF were coffee with cow&rsquo, s milk (or milk with coffee), added sugar, bread, and margarine, indicating that these are the identity markers of BF in the studied sample. Considering that the percentage of standard type BF was very high and that the consumption of added sugar and margarine was accentuated, actions to stimulate the intake of fresh fruits and foods in all meals are necessary, especially in the first meal of the day. There is a need for new proposals for actions and programs with the purpose of expanding access to healthy and adequate regional foods, especially to low-income families.

The menu offered in restaurants must meet different aspects of quality. Cultural elements are related to their acceptance and can contribute to the preservation of habits, sustainable agricultural systems, and the maintenance of biodiversity and sustainability, among other factors. In this context, this research proposes an instrument for classifying menus regarding the presence/absence of regional foods called the identifier of regional foods presence (IRFP) as a new perspective to evaluate sustainable menus. For this, lists of regional preparations and ingredients were prepared for each Brazilian region. Sequentially, we submitted the dishes/ingredients to a developed decision tree for the classification of foods into regional or national foods. The score, based on the presence/absence of regional foods, considered the components of a menu, with zero attributed to a lack of regional ingredients/dishes. For national dishes/ingredients, researchers attributed a minimum score equal to ten. One regional food gave a score of50 to the menu, and with more than one regional food, a daily menu scored 100. The final menu evaluation was based on the mean scores of the menus in each restaurant. Scores between 0–49.9 were considered inadequate; 50–74.9, adequate; and excellent between 75–100. The IRFP was applied to 111 menus with data collected from all the offered dishes. In total, the study evaluated data from 774 recipes from the menus of 37 restaurants located in the five Brazilian regions with a similar operating system. ANOVA was used to verify if there was a statistical difference between the mean score of each Brazilian region (p < 0.05). The average score obtained by the IRFP in menus from Brazilian community restaurants was 80.3 ± 30.9 (excellent), showing a significant difference between the Northeast and Southeast Regions, with a more significant presence of regional foods in the Northeast (87.7 ± 28.7). The use of the IRFP in menus was shown to be easy in its application, contributing to a stimulation of the use of regional items and, consequently, to the direct and indirect benefits generated for the food system and the local population.