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Effects of microplastics on the intestines
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This correspondence addressed issues related to PET microplastics, commenting on methodological, policy, or scientific aspects of PET plastic research in an environmental context. The letter contributes to ongoing scientific discussion about monitoring, assessment, or regulation of PET-derived microplastics.
Microplastics (MPs) are small pieces of plastic less than 5 mm in diameter. They are formed both as a primary product, which has found use in textiles and microspheres in cosmetics, and as a secondary product, resulting from the degradation of larger pieces of plastic due to physical, chemical, and even biological factors. The intestinal barrier is one of the body’s lines of defence against the entry of MPs molecules into the body. It can enter the body through various mechanisms and cause accumulation in the intestines and other organs. Furthermore, MPs can cause changes in the function of the intestinal barrier and increase its permeability, causing increased accumulation of particles. However, the actual extent of human exposure is still unknown due to discrepancies in the methodology of the available studies. Therefore, new validated analytical methods and long-term studies are needed to better understand the effects of microplastics on intestinal health.
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Potential effects of MPs and their co-pollutants on human intestinal tract
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This review examines how microplastics and their co-pollutants enter and damage the human intestinal tract, summarizing evidence for microplastic-induced gut barrier disruption, microbiota alteration, and systemic translocation to other organs.
Microplastic: A potential threat to human and animal health by interfering with the intestinal barrier function and changing the intestinal microenvironment
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This review summarizes current research on how microplastics disrupt the gut environment in both animals and humans, focusing on damage to the intestinal barrier. Studies show that microplastic exposure can cause oxidative damage, inflammation, destruction of the gut lining, thinning of the protective mucus layer, and disruption of beneficial gut bacteria. While direct human evidence is still limited, the growing body of animal research suggests that microplastics could pose a meaningful threat to intestinal health.
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This review pulls together existing research on how the tiny plastic particles we swallow through food and water may mess with our gut health. The evidence suggests microplastics can shift our gut bacteria toward less beneficial types while reducing helpful bacteria that support digestion, and this may weaken the gut's protective lining—potentially allowing harmful substances to pass into the body more easily. While more research is needed to fully understand the risks, this adds to growing concerns about how everyday plastic exposure might affect our long-term health.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.