Environmental Laboratory 47 Rising micro- and nanoplastic levels linked to increased health risks
A new study reveals that the rising global levels of micro- and nanoplastics (MnPs) absorbed into the human body may heighten the risk of cancer, diabetes, cardiovascular disease, and chronic lung disease. These non-communicable diseases (NCDs) are associated with infl ammatory conditions in the body’s organs, and the tiny MnP particles can enhance their uptake within the digestive and respiratory systems, potentially increasing the risk and severity of NCDs in the future.
Notably, MnP concentrations in infant faecal matter are signifi cantly higher than in adults. This disparity is likely due to the prevalent use of plastic in infant food preparation, presentation, and storage, as well as young children’s tendency to put objects in their mouths.
An international group of researchers published these fi ndings in Cell Reports Medicine and is advocating for a global integrated One Health approach to human health and environmental research. This approach aims to uncover the environmental mechanisms behind the rise in human MnP exposure and their links to NCDs.
Lead author Professor Stefan Krause from the University of Birmingham emphasised the urgency of addressing plastic pollution: “Plastic pollution has increased globally, making it critical to understand the overall health risks associated with MnP exposure. We must tackle this pollution at its source to reduce further emissions, as the global dispersal of MnPs that has already occurred will remain a concern for centuries.”
The researchers draw parallels between MnPs and other particles, such as natural pollen and human-made pollutants like diesel exhaust. The body treats these particles as foreign entities, triggering protective mechanisms that can become overwhelmed, thereby increasing the frequency and severity of NCDs.
NCDs are on the rise globally, responsible for 71% of all annual deaths and projected to have an economic impact exceeding $30 trillion over the next two decades. Co-author Semira Manaseki-Holland from the University of Birmingham stressed the importance of understanding the interaction between MnPs and NCDs to advance global prevention and treatment efforts, particularly toward the UN Sustainable Development Goal of reducing premature mortality from
NCDs by 2030. This is especially critical
low- and low-middle-income countries, where NCD prevalence is rising alongside high levels of plastic pollution.
Global pollution trends show that MnPs, defi ned as particles smaller than 5 mm for microplastics and smaller than 1 µm for nanoplastics, are ubiquitous. They have been detected in lungs, blood, breast milk, placenta, and stool samples, confi rming that MnPs enter the human body from various environmental sources. Humans are exposed to MnPs through food, drinks, air, cosmetics, and personal care products.
MnPs have been found in fi sh, salt, beer, bottled drinks, and air, released from
synthetic clothing, plastic fabric bedding, plastic carpet, and furniture. Other sources include fertilisers, soil, irrigation, and uptake into food crops. Human exposure to MnPs varies signifi cantly based on location and exposure mechanism, with indoor air pollution hotspots containing up to 50 times more particles than outdoor air.
Co-author Professor Iseult Lynch from the University of Birmingham highlighted the need for a comprehensive understanding of the human health risks associated with MnPs, calling for close collaboration between environmental and medical scientists to achieve this goal.
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The Advantages of Using EDXRF for Monitoring Environmental Contaminants
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