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Microplastics disrupt intestinal physiology: From microbiota composition to intestinal barrier integrity
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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.
Microplastics (MPs), defined as plastic particles smaller than 5 mm, either intentionally manufactured or generated through the degradation of larger plastic materials, have infiltrated the food chain and have been detected in various human biological samples. Among the possible exposure routes, ingestion appears to be the primary one; however, the mechanisms by which MPs may cross the intestinal barrier-such as transcytosis, uptake by Microfold Cells, persorption, and barrier dysfunction-and disseminate throughout the body remain poorly understood. In addition to their potential direct toxicity, stemming from their ability to carry plastic additives and adsorbed environmental pollutants, an increasing body of evidence indicates that MPs can disrupt intestinal physiology through multiple mechanisms once they reach the intestinal lumen. The aim of this narrative review is to gather and critically analyze current evidence regarding the effects of MPs on gut homeostasis, with particular focus on the mechanisms underlying their interactions with the gut microbiota and the intestinal epithelial barrier. The findings indicate that MPs pose an emerging challenge to intestinal physiology, being capable of disrupting gut homeostasis by reducing short-chain fatty acid-producing bacteria while promoting proteolytic and pro-inflammatory taxa. These alterations ultimately compromise intestinal barrier integrity.
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The Gut Microbiome in Foodborne Microplastic Toxicity: Mechanistic Insights and Human Health Risk Assessment
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This review pulls together existing research on how microplastics we eat, tiny plastic particles found in food and water, may disrupt the trillions of bacteria living in our gut, weakening the gut's protective barrier and triggering inflammation and stress throughout the body. It also points out that plastics can act like tiny rafts, carrying other harmful chemicals into our system and making the damage worse. While scientists don't yet have the full picture, this matters because it suggests the microplastics in our daily diet could be quietly affecting digestive and overall health, making this an area worth watching closely.
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.
Microplastic Toxicity and Intestinal Homeostasis: Insights from Microbiome and Gut Barrier Dysfunction
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This review pulls together animal, lab, and human studies suggesting that microplastics we eat, drink, and breathe can disrupt the balance of good and bad bacteria in our gut, weaken the gut's protective lining, and trigger inflammation—effects that may ripple out to metabolism, hormones, and even brain function. While most of this evidence comes from animal and lab studies using higher doses than humans typically encounter, it's an early warning sign that everyday plastic exposure could quietly affect long-term gut health, and researchers say we need bigger, more consistent human studies to know how worried to be.
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This review pulls together existing animal research on how tiny plastic particles called microplastics—found in food, water, and air—can throw off the balance of good and bad bacteria living in our gut. This imbalance may weaken the gut's protective barrier, trigger inflammation, and mess with metabolism, which over time could contribute to disease. While the gut microbiota does have some natural defenses against this stress, the findings are a reminder that everyday plastic exposure may have hidden effects on our internal health, not just the environment.
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Tiny plastic particles from our food, air, and water may be doing more than just passing through our bodies, this review of existing research suggests they can irritate the gut lining, trigger inflammation, and throw off the balance of healthy gut bacteria. While scientists haven't yet nailed down exactly how much exposure causes harm or the precise mechanisms involved, the evidence so far suggests these ever-present plastic particles could be a hidden contributor to digestive health problems, making it a research area worth watching.
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