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Experimental Findings on Intestinal Health

A 10-week study conducted by scientists at Universidade Federal de Sao Paulo (UNIFESP) investigated the impact of xanthan gum on the digestive tracts of rats. The researchers observed that regular ingestion of the additive led to significant physiological changes, including inflammation of the colon and a breakdown in the integrity of the intestinal barrier.

Histological analysis confirmed that the inflammatory response was more severe in subjects receiving medium and high doses of the additive. Biochemically, the researchers noted an increase in the concentration of claudin-2, a protein that, while typically involved in sealing epithelial cells, can form microscopic channels that increase gut permeability when present in excess.

Markers of Inflammation and Microbial Imbalance

The study identified a rise in pro-inflammatory markers—specifically cytokines IL-1beta and TNF-alpha—which are known to exacerbate inflammatory reactions in the gut. The presence of these markers correlated with an increased number of lymphocytes within the intestinal wall, signaling an active immune response.

“Szczególnie TNF-alfa wiąże się z obumieraniem komórek wyściełających jelito oraz z rozwojem chorób zapalnych.”

Alessandra Rischiteli, researcher at UNIFESP

While the overall diversity of the gut microbiota remained relatively stable, researchers observed a state of dysbiosis. Notably, there was an increase in the abundance of bacteria from the Elusimicrobiota phylum, which has previously been associated with inflammatory processes. This shift suggests that even without a total collapse of gut bacterial diversity, the additive may disrupt the delicate microbial balance required for optimal intestinal health.

Regulatory History and Clinical Implications

Xanthan gum, a polysaccharide produced through the fermentation of carbohydrates by the bacterium Xanthomonas campestris, is a ubiquitous ingredient in the food industry. It is prized for its ability to thicken, stabilize, and gel products ranging from yogurt and ice cream to gluten-free pasta and protein supplements.

The recent findings have reignited discussions regarding the safety of the additive, especially in the context of populations with specific dietary needs. Following this, the U.S.

Expert Guidance on Daily Consumption

Despite the findings, scientists emphasize that the study does not necessitate a total removal of xanthan gum from the diet, as the results were observed in animal models and require further investigation in human populations. Instead, the focus is on the cumulative effect of consuming the additive as part of a highly processed diet.

• For General Consumers: Experts recommend minimizing intake of ultra-processed foods that contain high levels of technological additives.

The research underscores the need for translational studies involving human participants to determine if the effects observed in rodents occur at the levels typically found in human diets. As health authorities continue to evaluate food additives, the primary recommendation remains a cautious approach to processed ingredients, particularly for vulnerable groups such as children and the elderly.