Research increasingly indicates that ultra-processed foods (UPFs) may negatively impact health, though the underlying mechanisms remain unclear. A new study has discovered that individuals with high UPF consumption exhibit different blood metabolites, characterized by higher levels of harmful fatty acids and lower levels of beneficial fatty acids compared to those with lower UPF intake. The findings suggest that UPF consumption may not only increase cholesterol production but also disrupt healthy lipid processing.
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Ultra-processed foods, which are often rich in fat, sugar, carbohydrates, sodium, and energy, have been linked to various negative health outcomes. A recent study identified 32 potential adverse health effects associated with high UPF intake, including cardiovascular diseases, type 2 diabetes, and obesity. This study, published in Critical Reviews in Food Science and Nutrition, presents biological evidence that high UPF consumption alters blood metabolite levels, negatively affecting lipid profiles essential for cellular function.
Jessica Blanco-López, MD PhD, the study's lead author and Head of Research at the School of Medicine, Universidad Francisco Marroquín in Guatemala, stated that the research provides insight into how UPFs may influence health through distinct metabolic patterns. The study analyzed data from the EPIC cohort, involving over 520,000 participants from 10 European countries, where participants detailed their dietary intake and provided blood samples between 1992 and 2000.
The researchers focused on dietary data from over 15,200 individuals, categorizing food intake using the NOVA classification system, which ranges from minimally processed foods to ultra-processed products. Participants reported a median UPF intake of 12.6% of their overall diet, with actual intake levels varying widely.
Thomas M. Holland, a physician-scientist not involved in the study, noted that the findings contribute to understanding the connection between high UPF consumption and health. The study identified metabolic changes associated with increased UPF intake, such as higher levels of certain lipids linked to impaired fatty acid oxidation.
Blanco-López highlighted the significance of the findings, noting that lower levels of beneficial omega-3 fatty acids, along with higher levels of omega-6 fatty acids and trans fats, were particularly alarming. These alterations in fatty acid composition may have serious implications for overall health, as the types of fats present in the bloodstream can affect cardiovascular, metabolic, and cognitive functions.
While the study provides observational data and cannot establish causation, it reinforces concerns regarding high UPF intake and its potential to influence long-term health outcomes. Blanco-López suggested that further research in diverse populations and rigorous studies, such as longitudinal or controlled feeding trials, are necessary to clarify these relationships.
Holland emphasized that a lifestyle focusing on minimally processed foods, along with regular exercise and good sleep habits, is essential for maintaining health over time. He concluded that reducing reliance on ultra-processed foods might be an important aspect of a comprehensive healthy lifestyle.