We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Microplastics as Emerging Contaminants: Pathways, Environmental Persistence, and Human Health Implications
Summary
This review pulls together recent research on microplastics — tiny plastic particles that break down from larger waste — and how they travel through our environment, air, water, and food before ending up in our bodies through eating, breathing, and even skin contact. Early lab and animal studies suggest the smallest particles (nanoplastics) might trigger cell damage and inflammation, but scientists still don't know how much exposure happens in real life or what it means for long-term health. Bottom line: microplastics are everywhere and getting into us, but researchers need better, more consistent studies before we can say exactly how worried to be.
Microplastics (MPs) have emerged as persistent environmental contaminants due to their persistence, widespread distribution, and potential risks to the environment and human health. This review focuses on the sources of MPs, their potential environmental risks, and human impacts, as documented in the recent literature from 2020 to 2026. Recent studies focusing on pathways, environmental weathering, and toxicity were evaluated and synthesized into the analysis. Previous studies have demonstrated that microplastics are transported across and between environmental compartments. Environmental degradation, driven by ultraviolet radiation, mechanical fragmentation, and oxidation, can alter microplastics’ surface characteristics, which may affect microplastic mobility, reactivity, and the solid-state adsorption of contaminants. Human exposure occurs primarily through ingestion and inhalation, with dermal and occupational exposure also contributing under certain conditions. Emerging evidence from in vitro, animal, and human tissue studies suggests that smaller particles, particularly nanoplastics, may contribute to oxidative stress, inflammation, and cellular injury; however, important uncertainties remain regarding environmentally realistic exposure levels, long-term health outcomes, and the extrapolation of experimental findings to real-world human health risk. Overall, the current literature highlights the need for standardized methodologies, improved integration of environmental monitoring and exposure assessment, and stronger evidence to support risk assessment and policy development.