Avoiding ultraprocessed foods supports healthier aging

A recent study has unveiled that older adults can significantly decrease their intake of ultraprocessed foods while maintaining a familiar and balanced diet, resulting in notable improvements in appetite regulation and metabolism. This finding, published in the journal Clinical Nutrition, underscores the importance of diet in healthy aging. Ultraprocessed foods are typically produced using industrial methods and contain ingredients that are rarely found in home cooking. These items often include additives like emulsifiers, flavorings, and preservatives. Common examples are packaged snacks, ready-to-eat meals, and certain processed meats. Research has consistently linked high consumption of ultraprocessed foods to negative health outcomes. In the study, researchers recruited participants aged 65 and older, many of whom were either overweight or had metabolic risk factors such as insulin resistance or elevated cholesterol levels. Participants followed two distinct diets low in ultraprocessed foods for eight weeks each. One diet included lean red meat (pork), while the other was a vegetarian option that included milk and eggs. There was a two-week period in between where participants returned to their usual eating habits. Out of 43 individuals who started the dietary intervention, 36 completed the entire study. Remarkably, both diets limited ultraprocessed foods to less than 15 percent of their total caloric intake, a significant decrease compared to the average American diet, where ultraprocessed foods account for over 50 percent of calories. The diets were crafted to be practical for everyday life, and participants were not required to restrict calories, lose weight, or modify their physical activity levels. All meals and snacks were provided by the researchers, ensuring that participants consumed minimally processed ingredients aligned with the 2020-2025 Dietary Guidelines for Americans, which recommend healthy eating based on nutrient intake. Looking ahead, the upcoming 2025-2030 Dietary Guidelines, set to be released on January 7, 2026, will explicitly advise reducing ultraprocessed food consumption, marking a shift from previous guidelines that did not address food processing directly. This innovative feeding study allows for a deeper understanding of how minimizing ultraprocessed foods can benefit health while still meeting recommended nutrient levels.