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Microplastics and Nanoplastics as Environmental Contaminants of Emerging Concern: Potential Hazards for Human Health
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This review covers how microplastics and nanoplastics enter humans through food, air, and skin contact, accumulating in the body over time. Inhaled particles can damage the lungs from the upper airways down to the deepest air sacs, and prolonged exposure has been linked to chronic inflammation, autoimmune disease, atherosclerosis, and cancer. The authors call for source reduction, material substitution, and better filtration to reduce exposure.
With nearly 40% of the total plastics produced being used for packaging, up to five trillion plastic bags are consumed in the world annually. The inadequate disposal of plastic waste and its persistence has become a serious challenge/risk to the environment, health, and well-being of living creatures, including humans. The natural degradation of plastics is extremely slow; large pieces of plastic may break down into microplastics (MPs) (1 μm–5 mm) or nanoplastics (NPs) (<1000 nm) after protracted physical, chemical, and/or biological degradations. A brief overview of the transport of micro- and nanoplastics in the aquatic, terrestrial, and atmospheric environments is presented. Details are provided on the exposure routes for these waste materials and their entry into humans and other biota through ingestion, inhalation, and dermal contact. The greatest concern is the cumulative impact of the heterogeneous secondary MPs and NPs on planetary and human health. Inhaled MPs and NPs have been shown to affect the upper respiratory tract, lower respiratory tract, and alveoli; prolonged exposure can lead to chronic inflammatory changes and systemic disease. These can also lead to autoimmune diseases and other chronic health conditions, including atherosclerosis and malignancy. Sustainable mitigation strategies to reduce the impact of MPs/NPs include source reduction, material substitution, filtration and purification, transformation of plastic waste into value-added materials, technological innovations, etc. Multidisciplinary collaborations across the fields of medicine, public health, environmental science, economics, and policy are required to help limit the detrimental effects of widespread MPs and NPs in the environment.
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From environment to body: sources and health consequences of microplastics and nanoplastics in humans
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This review summarizes existing research on how tiny plastic particles called microplastics and nanoplastics enter the human body through food, water, air, and skin contact. Studies cited suggest these particles may build up in tissues and are linked to inflammation, immune problems, and other health issues, though long-term human health risks remain unclear.
A review on microplastics and nanoplastics in the environment: Their occurrence, exposure routes, toxic studies, and potential effects on human health
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This review summarizes what is known about how microplastics and nanoplastics enter the human body through food, air, and skin contact, and what they do once inside. Studies on cells and animals show these tiny particles can cause oxidative stress, DNA damage, inflammation, and harm to the immune, digestive, reproductive, and nervous systems. The research makes clear that microplastics are not just an environmental problem but a direct concern for human health.
Impact of microplastics and nanoplastics on human Health: Emerging evidence and future directions
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This review summarizes current evidence on how micro- and nanoplastics enter the human body through food, air, and skin contact, and the cellular damage they may cause. While microplastic pollution is a recognized environmental hazard, the authors note that definitive evidence linking plastic particle exposure to specific health outcomes in humans is still limited and more realistic exposure studies are needed.
Microplastics And Nanoplastics: Environmental Sources, Human Exposure Pathways, And Potential Health Impacts
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This systematic review maps out the many ways microplastics and nanoplastics enter the human body, including through food, water, air, and everyday products. The researchers found these tiny particles are now present in nearly every environment, from oceans to our homes. The review highlights growing concerns about what this constant low-level exposure might mean for our long-term health.
Air pollution and its impacts on health: Focus on microplastics and nanoplastics
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This review summarizes how airborne micro- and nanoplastics enter the body through breathing, eating, and skin contact, contributing to health risks alongside traditional air pollutants. Plastic particles have been found in human blood, vein tissues, and lungs, and their presence in fine particulate matter in urban air may worsen the inflammation, oxidative stress, and respiratory and heart disease risks already associated with air pollution.
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