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The distribution of nano- and microplastics in the human body: a Hybrid Perfusion-Diffusion based PBK model
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A Hybrid Perfusion-Diffusion based PBK model for the distribution of nano- and microplastics in the human body
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Researchers developed a hybrid physiologically-based kinetic model to predict the distribution of nano- and microplastic particles in the human body after ingestion. The model integrates perfusion and diffusion processes to estimate tissue-specific particle concentrations across different exposure scenarios.
A Hybrid Perfusion-Diffusion based PBK model for the distribution of nano- and microplastics in the human body
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Researchers developed a hybrid perfusion-diffusion physiologically based kinetic model to predict the distribution of nano- and microplastics in the human body across tissues and organs, addressing a key gap in human health risk assessment. The PBK model framework enables estimation of internal plastic particle doses in specific organs from external exposure data, supporting more mechanistic risk assessments.
The distribution of nano- and microplastics in the human body: a hybrid perfusion-diffusion based PBK model
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Scientists built a computer model that predicts how tiny plastic particles from air and food travel through and build up in different organs of the body, based on particle size. The model found that breathing in plastic particles leads to more of them lingering in your body, while swallowed plastic particles are mostly flushed out—though both pathways ultimately end up eliminated mainly through waste. This tool could help researchers better predict health risks from plastic pollution exposure, even though more human data is still needed to confirm real-world accuracy.
Microplastic Pollution: Human Exposure, Uptake, Accumulation Pathways, and Potential Health Consequences
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Researchers reviewed the exposure routes, uptake mechanisms, and accumulation pathways of microplastics in the human body, concluding that the ubiquitous presence of these particles warrants urgent investigation into their long-term ecological and health consequences.
Lifetime exposure to microplastics: From consumption to distribution in the body
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This review pulls together existing research to estimate that over a lifetime, the average person swallows or breathes in about 224 million tiny plastic particles, and roughly 59% of that stays in the body rather than being flushed out. Exposure builds up most during adulthood, mainly from foods like edible oils and fruits, plus air, and these particles have been found lodged in various organs, including surprisingly high levels in ovarian fluid. While scientists are still figuring out exactly how this affects health, the sheer scale of lifelong buildup is a strong signal that reducing plastic exposure, especially in food and packaging, deserves serious
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