Ultra-Processed Plant Foods Trigger Inflammation
New research finds that ultra-processed plant-based foods can trigger the same gut inflammation markers as their meat-based counterparts, challenging assumptions about plant-based alternatives' healthfulness. The study emphasizes the importance of choosing whole, minimally processed foods for gut health regardless of whether they're plant or animal-based. This adds nuance to the ongoing debate about processed food impacts on health.
The research identified key biomarkers for systemic and gut-level inflammation, including C-reactive protein (CRP) and interleukin-6 (IL-6), which did not differ based on whether the ultra-processed food was meat or plant-based. These markers are well-established indicators of chronic inflammation in the body. Scientists point to specific additives as a potential cause. Emulsifiers like carboxymethylcellulose and polysorbate-80, common in many processed foods, have been shown in animal models to degrade the gut's protective mucus layer, which can allow bacteria to trigger an inflammatory response. Other ingredients under scrutiny include carrageenan, a thickener derived from seaweed that is often used in plant-based milks and meat alternatives. While approved for use in food, some studies in cells and animals have linked the additive to increased intestinal inflammation. Ultra-processed foods are defined by industrial formulations using substances not typically found in a home kitchen. These can include protein isolates, hydrogenated oils, high-fructose corn syrup, and cosmetic additives like artificial colors, flavors, and emulsifiers. The consumption of ultra-processed foods is widespread, accounting for nearly 60% of the average adult's diet and almost 70% of children's diets in the United States. A French study following over 63,000 adults found that certain high-quality, minimally processed plant-based diets lowered cardiovascular risk by about 40%, but some ultra-processed plant-based diets actually increased the risk by a similar amount. However, not all plant-based alternatives fall into the ultra-processed category. A 2023 study of products on the Spanish market found that between 59% and 63% were not classified as ultra-processed, highlighting the diversity within the category. Furthermore, some research complicates the narrative by separating different types of ultra-processed foods. One study found that while processed animal products were linked to higher disease risk, plant-based meat alternatives were associated with a reduced risk of developing diabetes. Another study associated these alternatives with longer telomeres, a marker of slower cellular aging.
