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Can Micro- and Nanoplastics Modify Food-Allergy-Relevant Pathways?—A Comprehensive Narrative Review
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This review pulls together existing lab and animal research suggesting that tiny plastic particles from our food, water, and packaging could interfere with digestion, gut health, and immune signals in ways that might make food allergies worse, especially in babies, whose guts are still developing and who often use plastic bottles and feeding gear. However, this is based on test-tube and animal studies only; no research has yet confirmed whether microplastics actually increase allergy rates or severity in real people, so more human studies are needed before drawing firm conclusions.
Micro- and nanoplastics (MNPs) are widely detected in food, drinking water, food-contact materials, and human biological samples. This narrative review evaluates whether experimental evidence supports a role for MNPs as modifiers of food-allergen digestion, intestinal-barrier function, microbiota composition, and immune tolerance. In vitro studies indicate that protein-corona formation can alter allergen conformation, epitope accessibility, and proteolysis, although effects vary by polymer, particle size, dose, and digestive model. Rodent studies provide evidence that MNP exposure can disrupt epithelial integrity, induce oxidative and inflammatory signaling, and modify microbiota-dependent immune regulation. More direct food-allergy models have reported exacerbation of ovalbumin- and cow’s-milk-allergic responses, including Th2 polarization and changes in dendritic cell and regulatory T-cell compartments. Infants may represent a susceptible and highly exposed population because of immature digestive and barrier function and the use of plastic feeding equipment; however, the available pediatric evidence is limited to exposure studies and simulated digestion. The effect of MNP exposure on the incidence of food allergies, reaction thresholds, or clinical severity in humans has not yet been studied. Accordingly, current findings support biological plausibility and identify research priorities, but they do not establish causality in humans.
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This review explored whether exposure to nano- and microplastics through food could contribute to the rising rates of food allergies worldwide. Researchers found that these tiny plastic particles may alter the structure of food allergens, increase gut permeability, promote intestinal inflammation, and disrupt the immune system. While direct evidence is still limited, the study suggests that microplastics in the diet could potentially heighten sensitivity to food allergens.
The Plasticene Paradigm: Microplastics, Gut Dysbiosis, and Food Allergy — A Critical Commentary
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This commentary reviews existing research on whether microplastics in food might disrupt gut bacteria and contribute to food allergies. It notes that most evidence comes from animal studies using much higher plastic doses than people likely encounter, and calls for further research, including long-term studies tracking plastic exposure in infants.
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This commentary reviews existing animal research suggesting that microplastics eaten in food may disrupt gut bacteria, potentially contributing to food allergy. It notes that most animal studies used much higher plastic doses than humans typically encounter, so the link remains unproven in people, and calls for further human studies.
The Plasticene Paradigm: Microplastics, Gut Dysbiosis, and Food Allergy — A Critical Commentary
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This paper reviews existing research on whether microplastics in food might disrupt gut bacteria and contribute to food allergies. It notes that most evidence comes from animal studies using much higher plastic doses than people are estimated to encounter, limiting conclusions about human risk, and calls for more human-based research.
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