Ultra-processed foods often contain emulsifiers, microparticles, thickeners, stabilizers, flavors and colors. Experiments in mice have shown that these substances alter the gut microbiome (the community of microorganisms living in the intestines) in several ways. This may affect the functioning of the immune system.
Studies in mice have shown that exposure to low concentrations of emulsifiers can weaken the intestinal mucosal barrier. As a result, it will be easier for microbes to enter and exit the intestines. Changes in mucosal barrier integrity were also associated with higher levels of inflammatory markers.
Lack of fiber, which is typical of diets rich in ultra-processed foods, can also affect the integrity of the intestinal barrier.
Additionally, ultra-processed foods have been linked to changes in the gut microbiome. Diets rich in saturated fat, sugar, salt, and emulsifiers have been shown to reduce the amount of beneficial bacteria in the intestines of mice. There was also an increase in the number of harmful bacteria that cause inflammation.
Human studies support all these findings. One study found that those who avoided ultraprocessed foods had significantly lower levels of systemic inflammation and a healthier gut microbiome compared to those who followed a regular diet.
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Source: Ferra
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