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Environmental Micro(nano)plastic Exposure and Associated Human Health Risks: A Comprehensive Review
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Tiny plastic particles called microplastics are showing up everywhere — including inside our bodies, with scientists detecting them in blood, liver, kidneys, and even the brain. This review of existing research found that indoor air actually has more of these particles than outdoor air (bad news for kids who spend lots of time inside), and farm soils treated with plastic mulch contain over twice as many microplastics as untreated soil. While scientists still don't fully understand how these particles harm us, their spread into our food, air, and bodies is a growing health concern worth taking seriously.
Micro(nano)plastics (MNPs) represent a pervasive and escalating threat to global ecosystems and human health. This review provides a critical synthesis of MNPs’ exposure risks across marine, atmospheric, and terrestrial compartments, with a distinct emphasis on identifying cross-media linkages and methodological inconsistencies that limit current risk assessments. Within marine environments, pollution hazard indices reveal significant spatial heterogeneity, yet their utility is constrained by the absence of toxicity weighting and particle characteristic integration. Atmospheric exposure profiles show variable risks, and the MNPs’ concentration in indoor air (up to 15.8 particles/m3) is significantly higher than in outdoor environments, posing a greater inhalation risk to infants and children who spend more time indoors. A marked increase in MNPs’ concentrations within agricultural soils is identified, where the MNP content in mulched soils (average: 570.2 particles/kg) is more than twice that of non-mulched soils (259.6 particles/kg). Critically, studies have now detected MNPs within human tissues, including the blood, intestines, liver, kidneys, tonsils, and brain, highlighting an urgent need to elucidate their multi-organ toxicity mechanisms, with a novel synthesis of gut–brain axis disruption and transgenerational effects. By integrating exposure dynamics with mechanistic toxicity data, this review advances a cross-system framework that identifies priority research directions, namely standardized detection methodologies, combined pollutant toxicity, and cross-system toxicity mechanisms, which are essential for informing mitigation strategies amid this escalating public health crisis.
More Papers Like This
Microplastics in Indoor Environments and Associated Health Risks
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This review pulls together existing research showing that the air inside your home or office likely contains more tiny plastic particles (microplastics) than the air outside, coming from everyday things like household dust, synthetic fabrics, cleaning products, and packaging. Since most of us spend the majority of our time indoors, this matters because we're likely inhaling and ingesting more of these particles than previously realized, though scientists still don't fully understand the health risks. The researchers stress that more studies are needed to pin down exact dangers and figure out how to reduce this exposure at home.
Review of microplastics in the indoor environment: Distribution, human exposure and potential health impacts
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This review comprehensively analyzes microplastic contamination in indoor environments, where most people spend the majority of their time. Researchers found that indoor exposure to microplastics comes from multiple sources including dust, air, drinking water, and food, with finer particles posing the greatest concern because they can enter the bloodstream and organs. The findings suggest that indoor microplastic exposure represents a meaningful but understudied health risk that requires further research into mitigation strategies.
Microplastics and Associated Organic Pollutants in Indoor Environments
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This review pulls together what scientists currently know about microplastics floating in our indoor air and settling into household dust — and it turns out we're breathing and swallowing more of these tiny plastic particles than expected, especially in cities and near waste facilities. These particles often carry harmful chemicals like phthalates and flame retardants, and kids are exposed to higher doses than adults. The takeaway: our homes and indoor spaces are a significant, underappreciated source of plastic exposure, and more research is needed to figure out how to reduce it.
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.
Microplastic Pollution in Soil and Water and the Potential Effects on Human Health: A Review
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This review summarizes the current state of knowledge on microplastic pollution in soil and water environments and its potential effects on human health. Researchers compiled evidence showing that microplastics are now found throughout food chains, drinking water, and air, creating multiple exposure pathways for people. The study highlights that while microplastic contamination is widespread, more research is needed to fully understand the long-term health implications of chronic human exposure.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.