How much plastic do we inhale every day? A new study reveals shocking numbers
New scientific findings reveal alarming information about everyday life in indoor environments. According to a study published in PLOS One, an adult inhales up to 71,000 microplastic particles per day—far more than previously believed.
What is microplastic and where does it hide?
Microplastics are tiny plastic particles smaller than 5 millimeters, and recent research focuses on even smaller ones—under 10 micrometers—that can penetrate deep into lung tissue. In addition to food and drink, the latest findings show that a significant amount of these particles enter our bodies through inhalation in indoor spaces.
Scientists from the University of Toulouse used advanced Raman spectroscopy to analyze air samples from homes and cars. The average concentration of microplastics in homes was 528 particles/m³, while in cars it reached 2,238 particles/m³.
Shocking numbers: 100 times more than expected
Most of the detected particles were smaller than 10 micrometers, making them nearly invisible but especially dangerous. The authors of the study report that their measurements showed concentrations 100 times higher than previous estimates based on much larger particles.
People spend about 90% of their time indoors—at home, at work, in transport—and these spaces are the richest in airborne microplastic particles. Inhaling these particles happens daily, often without awareness of the potential health consequences.
What are the health risks?
Inhaled microplastics can reach deep into the respiratory system. Although long-term epidemiological studies have not yet been conducted, scientists warn of potential health risks: inflammation, cell damage, hormonal disruption, and even a higher risk of lung cancer.
Other studies have found microplastics in human blood, placenta, liver, kidneys, and brain, further confirming the ability of these particles to cross biological barriers and remain in the body.
What can we do?
- Ventilate indoor spaces regularly.
- Use air purifiers with HEPA filters.
- Avoid heating food in plastic containers.
- Choose clothing and fabrics made from natural materials.
- Reduce the use of single-use plastics.
Conclusion
Although microplastics have long raised concerns about ocean and food pollution, new findings clearly show that the air we breathe daily may be an even greater source of exposure. Further research is needed, along with behavioral changes, to reduce the amount of plastic in indoor environments.
Read more in the ScienceAlert article or directly in the scientific publication.
