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The Silent Conquest: The Journey of Micro and Nanoplastics Through Children’s Organs
Summary
This review examines the exposure routes, tissue distribution, and toxicological effects of micro- and nanoplastics specifically in children, synthesizing evidence that pediatric populations may face distinct and potentially greater health risks from MNP exposure due to developmental vulnerabilities.
Micro and nanoplastics (MNPs) are emerging environmental contaminants with increasing evidence of bioaccumulation in human tissues and potential toxicological effects. While extensive literature has investigated MNPs exposure and health risks in adult populations, data specific to pediatric age remain scarce and fragmented. This narrative review represents the first integrated synthesis of current evidence on MNPs exposure during early life, including the critical period of the first 1,000 days, examining routes of absorption (oral, inhalational, dermal, iatrogenic), biological distribution, and organ-specific effects in infants and children. Special attention is given to the presence of MNPs in pediatric lungs, thyroid, and intestinal microbiota, as well as to emerging non-invasive biomarkers for exposure assessment. The developing physiology of children—characterized by immature detoxification systems, critical windows of vulnerability, and prolonged life-course exposure—amplifies concern for long-term health consequences, including endocrine disruption, immune dysregulation, and neurodevelopmental impairment. This work fills a critical knowledge gap by consolidating pediatric data into a single comprehensive resource, and it is intended to serve both as a reference point for clinicians and researchers and a catalyst for future studies aimed at safeguarding child health in an increasingly plastic-contaminated world.
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