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Farm animals as a critical link between environmental and human health impacts of micro-and nanoplastics
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Researchers argue that farm animals — livestock exposed daily to microplastics and nanoplastics (tiny plastic particles under 5 mm and 1 micrometer, respectively) through contaminated feed, soil, and water — represent an understudied but critical link between environmental plastic pollution and human health risks through the food supply. The authors call for more research on how plastics transfer from agricultural environments through livestock into meat, dairy, and eggs consumed by people.
Abstract Plastic pollution is an increasing global health concern, particularly the ever-increasing amount of tiny plastic particles commonly referred to as micro- and nanoplastics (MNPs). Most research to date on MNP exposure and hazards has focused on environmental species such as aquatic organisms and, more recently, humans, leaving impacts on farm animals largely unstudied. MNPs have been detected in all environmental compartments, including agricultural environments, farm animals and food products originating from them. The health of farm animals can be directly affected by MNPs, while humans can be affected by MNPs present in animal-derived food products. In this perspective article, we argue that MNP research should give more attention to farm animals forming a critical link between the environment and human health. Here, we summarize evidence on sources, exposure routes, levels in farm animals, and potential health effects of MNPs on farm animals, and identify knowledge gaps for future research, such as effects of MNPs on reproduction and development. In particular, the bovine embryo model is a promising model to study effects of MNPs on early development of both farm animals and humans. This perspective article signals the need for follow up studies that will increase our understanding of the transfer of MNPs between environment, farm animals, and humans, and the potential of farm animals to serve as an indicator for other animals, including humans.
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Researchers reviewed evidence on how microplastics affect farm animals and the food supply chain, finding that controlled studies show oxidative stress, inflammation, and apoptosis at high doses, but whether ambient environmental concentrations cause measurable harm to livestock productivity or meat safety remains unresolved.
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This review pulls together existing research on how tiny plastic particles called nanoplastics affect farm animals, pets, and wildlife—and the findings are concerning: these particles can disrupt gut bacteria, harm reproduction, and damage the nervous system in animals exposed through food, water, and air. Since farm animals are part of our food supply, nanoplastics building up in their bodies could potentially make their way into the food we eat, though scientists still lack good tools to fully measure this risk. The takeaway is that plastic pollution isn't just an environmental problem—it may be quietly working its way up the food chain toward us, and we need
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This review summarizes the growing evidence that microplastics and nanoplastics harm livestock reproductive systems through oxidative stress, hormone disruption, and organ damage. Farm animals are particularly important because contaminants in their bodies can transfer to humans through meat, milk, and eggs. The review warns that microplastic accumulation in livestock could create a hidden food safety risk through biological amplification up the food chain.
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