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Microplastics in Food and Human Pharmacokinetics: A Scoping Review with Mechanistic Integration and Targeted Quantitative Synthesis
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This scoping review synthesized evidence on microplastic presence across dietary sources—seafood, water, salt, fruits, and vegetables—finding estimated human intake can exceed 100,000 particles per year, while noting that pharmacokinetic data on how the body absorbs, distributes, and excretes ingested MPs remain scarce.
Micro- and nanoplastics (MNPs) have become pervasive environmental contaminants, entering the human body primarily through ingestion and inhalation. Increasing evidence shows their presence in a variety of dietary sources, including seafood, drinking water, table salts, fruits, and vegetables. Estimated human intake can exceed 100,000 particles per year, yet their biological fate in humans remains poorly understood. Direct pharmacokinetic (PK) data describing absorption, distribution, metabolism, and excretion (ADME) are scarce, and much of the current understanding comes from in vitro human studies and in vivo animal models. Mechanistic insights are critical for interpreting these limited human data and for identifying potential health risks. This review will systematically map and synthesize existing literature on MPs in food and their PK in humans, integrating mechanistic evidence to provide a comprehensive overview and identify knowledge gaps.
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This review traces how microplastics move through the human body after being swallowed or inhaled, covering absorption, distribution, metabolism, and excretion. An adult may consume tens of thousands of microplastic particles each year through table salt and drinking water alone, and once inside, smaller particles can spread to different organs. The findings highlight that both the plastics themselves and the chemicals attached to them could pose health risks, though more research is needed to understand the full impact.
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This review takes a pharmacology-based approach to understanding how microplastics move through the human body, covering absorption, distribution, metabolism, and excretion. Evidence suggests that smaller particles (under 10 micrometers) can cross the gut barrier and accumulate in organs like the liver, kidneys, and lungs. Understanding these pathways is essential for determining what levels of microplastic exposure might actually cause harm to human health.
Microplastics: Sources, Environmental Distribution and Impacts on Human Health - A Comprehensive Review
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Researchers reviewed global evidence on microplastic sources, environmental distribution, and human health risks, estimating that individuals consume between roughly 12,000 and 193,000 microplastic particles per year — primarily through drinking water — with toxicity driven by both the particles' physical properties and their capacity to concentrate co-contaminants like heavy metals.
Microplastics: Sources, Environmental Distribution and Impacts on Human Health - A Comprehensive Review
AI summary Read the abstract
Researchers reviewed global evidence on microplastic sources, environmental distribution, and human health risks, estimating that individuals consume between roughly 12,000 and 193,000 microplastic particles per year — primarily through drinking water — with toxicity driven by both the particles' physical properties and their capacity to concentrate co-contaminants like heavy metals.
Microplastics in food: scoping review on health effects, occurrence, and human exposure
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Researchers reviewed evidence on microplastic contamination across many types of food and found that humans may ingest hundreds of thousands of microplastic particles per year through everyday foods including water and salt. The health effects remain unclear, but the widespread contamination creates a basis for ongoing, chronic exposure.
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