Humans Inhale Over 70,000 Microplastic Particles Daily: Study

A new study has revealed that people are breathing in tens of thousands of microplastic particles every day inside their homes and cars, raising fresh concerns about indoor air quality and potential health risks. The research, conducted by scientists from the Université de Toulouse, found that adults inhale an average of 71,000 microplastic particles per day. This figure is about 100 times higher than previously estimated.

Tiny Plastics, Big Problem

The study measured air samples from apartments and cars in Toulouse using advanced Raman spectroscopy and microscopy. The results showed that the median concentration of microplastics was around 528 particles per cubic meter in homes, while cars contained much higher levels at about 2,238 particles per cubic meter. Researchers noted that more than 94% of these particles were smaller than 10 micrometres, meaning they are small enough to travel deep into the lungs.

This finding is particularly worrying as such particles can bypass the body’s natural defence mechanisms, entering the lower respiratory system and potentially reaching the bloodstream. According to the researchers, these levels translate to adults inhaling roughly 3,200 particles sized between 10–300 micrometres and 68,000–71,000 particles sized between 1–10 micrometres each day.

Why Indoor Spaces Matter Most

Indoor environments, primarily cars, emerged as a significant source of exposure. People spend about 90% of their time indoors, making them more vulnerable to pollutants from synthetic fibres in carpets, furniture, paint, and car interiors. The enclosed nature of cars, combined with frequent use of artificial materials, results in significantly higher microplastic concentrations than in living spaces.

Previous studies have shown that these microscopic particles are shed from everyday items like upholstery, plastic packaging, and textiles, which continuously release fibres into the air. The findings highlight how ordinary living and commuting environments are turning into hotspots for microplastic exposure.

Health Risks and Reducing Exposure

While the long-term health effects of inhaled microplastics are still being studied, existing evidence links microplastic exposure to inflammation, hormonal disruption, cardiovascular issues, and even certain cancers. Given their size, these particles can penetrate deep into lung tissue, posing risks that may accumulate over time.

To limit exposure, experts suggest improving indoor ventilation, using HEPA air purifiers, regularly cleaning with HEPA-filtered vacuums, and reducing the use of synthetic materials in household and car interiors. Simple steps like avoiding plastic-based air fresheners and minimising heated plastic packaging can also help reduce airborne microplastic levels indoors.

References:

https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0328011

https://www.indiatoday.in/amp/health/story/humans-inhale-over-70000-microplastics-in-our-homes-and-cars-french-study-2764196-2025-07-31

https://www.iqair.com/in-en/newsroom/hepa-filter-air-purifier-benefits-misconceptions#:~:text=HEPA%20filter%20air%20purifiers%20are,exposure%20to%20allergens%20and%20irritants.

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