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Toxicological and Systemic Health Effects of Microplastics in Humans
Summary
This review paper pulls together what scientists currently know about how tiny plastic particles called microplastics—which we can breathe in, eat, or absorb through skin—might affect our health, including triggering inflammation, cell damage, and hormone disruption. The honest takeaway: while there's real reason for concern, researchers still don't know enough about long-term effects or whether these particles build up in our bodies over time, so more studies are needed before we can say exactly how worried to be.
Microplastics, characterized as plastic particles smaller than 5 mm, have become a widespread environmental pollutant, raising increasing apprehension regarding their possible effects on human health. This chapter provides a thorough examination of the existing understanding of the toxicological and physiological effects of microplastics on people. It delineates the principal sources and environmental behaviors of microplastics, succeeded by a comprehensive analysis of human exposure pathways, encompassing ingestion, inhalation, and skin contact. Focus is directed on the fundamental toxicological mechanisms, namely, oxidative stress, inflammation, and endocrine disruption, that could result in systemic health consequences. This chapter examines current detection methods for identifying microplastics in biological matrices, as well as recent advancements in analytical technology designed to enhance accuracy and sensitivity. An incisive examination of the literature uncovers substantial knowledge deficiencies, especially about the enduring effects of microplastic exposure, the potential for bioaccumulation, and the hazards of transgenerational toxicity. This chapter suggests future research avenues aimed at clarifying the behavior of microplastics in biological systems, examining their interactions with co-contaminants, and formulating appropriate mitigation methods. This chapter seeks to establish a fundamental comprehension that underpins risk assessment and policy formulation about the burgeoning problem of microplastic pollution.