Background: It is important to highlight the easy access that schoolchildren have today to ultra-processed products, and the prevalence of attention deficit has also been increasing in this age group. The objective of this study was to determine the association between the consumption of ultra-processed foods and attention deficit in schoolchildren from 6 to 12 years of age in private educational institutions in the cities of Lima and Arequipa in Peru in 2022. Methods: Cross-sectional analytical study. A non-probabilistic sampling was carried out, for convenience, the sample collected was 217 schoolchildren in 4 private educational institutions in the cities of Lima and Arequipa in Peru in 2022. Results: Of the total number of participants, 57.1% were women, 52.1% had ADHD, and 87.1% had a higher consumption of ultra-processed foods. No association was found between the main characterist...