This study analyzes food price trends in Brazil from January 2018 to March 2022, with a focus on the period of the COVID-19 pandemic (March 2020 to March 2022). Data from the Brazilian Household Budget Survey and the National System of Consumer Price Indexes were used to create a dataset containing monthly prices for the most consumed foods and beverages in the country. The food items were categorized according to the Nova food classification system. The study found that unprocessed or minimally processed foods and processed culinary ingredients were initially more affordable than processed and ultra-processed foods. However, trend analyses suggested a reversal of this pricing pattern, with the prices of minimally processed foods and processed culinary ingredients increasing relative to ultra-processed foods. This change is attributed to the impact of the COVID-19 pandemic on the global economy, leading to increased food prices and price dispersion worldwide. The study also highlights the concerning implications of these price changes, as the increased cost of healthy foods exacerbates food and nutrition insecurity in Brazil. Additionally, the trend encourages the consumption of unhealthy foods, posing a health risk to the population. The study concludes by discussing the need for government interventions to ensure food security and reduce the prevalence of obesity and other non-communicable diseases.This study analyzes food price trends in Brazil from January 2018 to March 2022, with a focus on the period of the COVID-19 pandemic (March 2020 to March 2022). Data from the Brazilian Household Budget Survey and the National System of Consumer Price Indexes were used to create a dataset containing monthly prices for the most consumed foods and beverages in the country. The food items were categorized according to the Nova food classification system. The study found that unprocessed or minimally processed foods and processed culinary ingredients were initially more affordable than processed and ultra-processed foods. However, trend analyses suggested a reversal of this pricing pattern, with the prices of minimally processed foods and processed culinary ingredients increasing relative to ultra-processed foods. This change is attributed to the impact of the COVID-19 pandemic on the global economy, leading to increased food prices and price dispersion worldwide. The study also highlights the concerning implications of these price changes, as the increased cost of healthy foods exacerbates food and nutrition insecurity in Brazil. Additionally, the trend encourages the consumption of unhealthy foods, posing a health risk to the population. The study concludes by discussing the need for government interventions to ensure food security and reduce the prevalence of obesity and other non-communicable diseases.