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Review: interactions between microplastics and the gastrointestinal microbiome
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This review summarizes existing research on how microplastics interact with the gut microbiome in humans, mice, chickens, and aquatic animals. Evidence suggests that gut bacteria can break microplastics into smaller pieces, which may make them more likely to cross the intestinal wall and enter the body. The disruption of the gut microbiome by microplastics is particularly concerning because balanced gut bacteria are essential for immune function, digestion, and overall health.
Plastics are ubiquitous materials in our daily lives, but their inadequate disposal has led to the widespread distribution of their micro-and nanoparticles in various ecosystems. Their detection in feed and food, as well as in livestock and human stool samples, strongly suggests a continuous circulation in the feed and food chain. The ability of plastic particles to penetrate the intestinal barrier determines their accumulation in the body and in food of animal origin. The gastrointestinal (GI) microbiome, whose fermentation activity can influence the particle size distribution of certain plastic materials and which is known to modulate the permeability of the intestinal barrier, may be a critical hub in this transfer. This review attempts to summarise research efforts to date on the interaction between microplastics (MPs) and the GI microbiome of humans, mice, chickens and aquatic animals. We have analysed the state of knowledge and identified future avenues for targeted research approaches to answer open questions regarding the interaction of plastic particles with the GI microbiome, which may help to develop predictive models for the accumulation of plastic particles from feed and food in the body and animal products, respectively. HIGHLIGHTS Microplastics (MPs) influence the gastrointestinal (GI) microbiome. The microbiome may facilitate microplastic breakdown. This may influence the size distribution of plastic particles and their potential to penetrate the intestinal barrier.
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This review summarizes evidence that microplastics commonly found in food and drinking water can disrupt the human gut microbiome when ingested. Studies show that microplastics alter the composition and function of intestinal bacteria, potentially affecting digestion, immunity, and overall health. Since a healthy gut microbiome is essential for human wellbeing, this pathway of harm deserves attention alongside other known risks of microplastic exposure.
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This review summarizes how microplastics affect gut bacteria in fish, mice, and earthworms after being swallowed. Microplastics can change the balance of gut microbes and reduce their helpful functions, leading to digestive problems, slower growth, and weakened immunity. Since humans are exposed to microplastics through food and water, these findings raise concerns that our own gut health could be similarly affected.
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