Are microplastics invading our bodies and our environment?
Every year, millions of tons of microplastics spread through the air, soil, and waterways, from urban areas to the most remote regions of the planet. These tiny particles, resulting from the fragmentation of plastic waste or intentionally produced, resist degradation and accumulate over time. Their presence in the environment raises growing concerns for human and animal health.
Microplastics, invisible to the naked eye, enter the body through food, breathing, and, to a lesser extent, the skin. Studies have already detected their presence in human blood, lungs, kidneys, and even the brain. Fibers and fragments, often from synthetic clothing or tires, are also found in the placenta, raising questions about risks to fetuses. Their size and shape influence their ability to travel through the body and cause inflammatory reactions, particularly in the lungs and digestive system.
In animals, exposure to these particles is associated with inflammation, metabolic disorders, and disruptions of the gut microbiome. While the direct effects on human health remain poorly understood, research suggests a possible link to respiratory diseases, immune imbalances, and risks to fertility. Microplastics also act as carriers of chemical pollutants or bacteria, amplifying their danger.
Food is the main source of exposure. Bottled water, seafood, salt, meat, and dairy products all contain traces of microplastics, with varying concentrations depending on the food and region. Indoor air, laden with fibers from textiles or carpets, is also a significant vector. Workers in recycling plants or residents of densely populated urban areas are particularly exposed.
Methods to measure and eliminate these particles remain limited. Wastewater treatment plants filter out a large portion of microplastics in water, but millions still end up in rivers and oceans. Inside homes, HEPA-filter air purifiers reduce their presence, while choosing filtered tap water over bottled water can decrease daily ingestion.
Faced with this widespread pollution, scientists are calling for increased research into long-term effects and the development of solutions to limit their spread. Reducing plastic waste and improving filtration techniques appear to be essential avenues for protecting both the environment and public health.
Credits
Source Study
DOI: https://doi.org/10.1007/s40572-026-00531-z
Title: Tracking Microplastics From Source to Impact: A Review of Environmental Presence, Exposure, Remediation, and Health Risks
Journal: Current Environmental Health Reports
Publisher: Springer Science and Business Media LLC
Authors: Imari Walker-Franklin; Anna Villalobos Santeli; Natalia Neal-Walthall