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Human exposure to microplastics: A review on exposure routes and public health impacts
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This review examines how microplastics enter the human body through food, air, and skin contact and the health effects they can cause, including oxidative stress, inflammation, hormone disruption, and potential DNA damage. Despite growing evidence of harm, the exact routes plastics take through the body and the cellular mechanisms behind their effects are still not well understood, and there is an urgent need for standardized detection methods.
• Critical review of methods for detecting microplastics in human tissues. • Exploration of human exposure routes to microplastic contamination. • Assessment of microplastic concentrations in human samples. • Focus on strategies for preventing and treating microplastic exposure. The presence of microplastics (MPs) in human body parts has raised significant concerns due to their status as a major environmental pollutant. Despite existing methods for detecting and identifying MPs in human tissues, there is a lack of standardized techniques, compromising the comparability of data across studies. This review critically analyzes the current knowledge on MPs in human body parts, sources and potential exposure pathways. This study underscores the urgent need for standardized and validated techniques for accurate MP analysis and characterization in human tissues, addressing the methodological challenges in MP detection. The findings of this review indicate that humans are exposed to MPs potentially through several routes such as ingestion, inhalation and dermal contact. However, the exact routes for MPs entering the body remain unclear. It also examines the wide range of health impacts associated with MPs, such as oxidative stress, inflammatory responses, endocrine disruption, and potential genotoxicity. Nevertheless, the cellular and molecular mechanisms underlying these effects are still not well understood, especially when considering the diverse concentrations, shapes, and sizes of MPs. Therefore, further research is essential, particularly to enhance epidemiological studies that can robustly establish the link between MP exposure and health impacts in large populations. Advancing this knowledge will be crucial for developing effective strategies to safeguard both environmental and public health from the detrimental effects of MPs.
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