The Hidden Health Cost of American Food: Ultra-Processed vs. Brazil's Fresh Food Culture

Ultra-processed foods now account for more than 57% of calories consumed by the average American adult. In South Brazil, that figure is closer to 25% — and falling. This single difference in diet explains a significant portion of the health gap between the two countries, and it is one of the first things American expats notice when they move to Florianópolis.

What "Ultra-Processed" Actually Means

The NOVA food classification system, developed by Brazilian nutrition researchers at the University of São Paulo, defines ultra-processed foods as industrial formulations made mostly from substances extracted from foods — sugars, oils, fats, starches, proteins — combined with additives, preservatives, artificial colors, and flavor enhancers. Think breakfast cereals, packaged bread, frozen meals, fast food, sodas, chips, and most snack products.

These are not simply "unhealthy" foods. They are engineered to override the body's natural satiety signals, promote overconsumption, and create habitual eating patterns. A landmark 2019 NIH study found that people randomly assigned to eat ultra-processed foods consumed an average of 500 more calories per day than those eating unprocessed foods — even when both groups had unlimited access to food and reported similar hunger levels.

The American Food System: A Public Health Crisis

The United States has one of the highest rates of ultra-processed food consumption in the world. According to research published in The BMJ, Americans derive more than 57% of their daily calories from ultra-processed products. The consequences are visible in the data: the US has obesity rates of 42.4%, type 2 diabetes affecting 37 million adults, and cardiovascular disease as the leading cause of death — all conditions strongly linked to ultra-processed food consumption.

The MAHA (Make America Healthy Again) movement, championed by Health Secretary RFK Jr. in 2025 and 2026, has brought renewed attention to the role of food additives, seed oils, and ultra-processed products in the American health crisis. Whatever one thinks of the political dimensions, the underlying nutritional science is well-established: the American food supply is making Americans sick.

Brazil's Dietary Guidelines: A Global Model

Brazil's national dietary guidelines, last updated in 2014, are widely considered the most progressive in the world. Rather than focusing on nutrients and macros, they focus on food — specifically, on eating minimally processed foods and traditional meals, and explicitly avoiding ultra-processed products. The guidelines state: "Always prefer natural or minimally processed foods and freshly made dishes and meals to ultra-processed foods."

This philosophy is not just government policy — it is cultural practice. In Florianópolis, the feira (open-air market) is a weekly institution. Families buy fresh produce, fish caught that morning, and homemade cheeses. Lunch is cooked at home or at a restaurante por kilo — a buffet-style restaurant where you pay by weight for fresh, home-cooked food. The concept of eating a bag of chips as a meal simply does not exist here in the way it does in the United States.

What Happens to Your Body When You Stop Eating Ultra-Processed Food

American expats in Florianópolis consistently report the same experience: within weeks of switching to a Brazilian-style diet — rice, beans, fresh vegetables, fruit, fish, and minimal packaged food — they lose weight, sleep better, have more energy, and experience fewer digestive issues. This is not anecdotal. It mirrors the clinical research on ultra-processed food elimination, which shows rapid improvements in metabolic markers, inflammation levels, and gut microbiome diversity.

A 2025 study by Brazil's Oswaldo Cruz Foundation linked high ultra-processed food intake to significantly higher rates of premature death — and found that the effect was dose-dependent: the more ultra-processed food consumed, the higher the mortality risk. The inverse is equally true: the more whole, fresh food consumed, the lower the risk.

The Cost Advantage of Eating Fresh in Brazil

Here is the part that surprises most Americans: eating fresh, whole food in Brazil is cheaper than eating ultra-processed food in the United States. A week of groceries for two people in Florianópolis — fresh produce, beans, rice, fish, chicken, fruit — costs the equivalent of $40–$60 USD. The same nutritional quality in a US city would cost $150–$200 or more. The economic barrier to eating well, which is enormous in the United States, is largely absent here.

Sources

1. 1. Hall KD et al. — Ultra-Processed Diets Cause Excess Calorie Intake, Cell Metabolism, NIH, 2019
2. 2. Monteiro CA et al. — NOVA food classification system, University of São Paulo
3. 3. Juul F et al. — Ultra-processed food consumption among US adults, The BMJ, 2022
4. 4. Brazilian Ministry of Health — Dietary Guidelines for the Brazilian Population, 2014
5. 5. Oswaldo Cruz Foundation — Brazilian study links ultra-processed foods to early death, DW, April 2025
6. 6. CDC — Adult Obesity Facts, 2024