Scientists at Universitat Autònoma de Barcelona have made a startling discovery – infusing tea through commercial tea bags may be releasing billions of microplastics and nanoplastics into the human body. The research, published in the journal Chemosphere, highlights the alarming levels of contamination found in commercially available tea bags.
The study reveals that polymer-based tea bags release microplastics and nanoplastics during brewing, which can be absorbed by human intestinal cells, potentially entering the bloodstream and spreading throughout the body. Food packaging is a leading contributor to micro and nanoplastic pollution, with humans primarily exposed through inhalation and ingestion.
The researchers employed advanced analytical techniques, including scanning electron microscopy, transmission electron microscopy, and nanoparticle tracking analysis, to characterize the structure, size, and behavior of the particles. The study found that mucus-producing intestinal cells absorbed the highest amount of these plastic particles from tea bags, which can penetrate the cell nucleus, potentially causing harm.
The findings raise serious concerns about the long-term health effects of microplastic exposure and emphasize the need for regulatory measures to minimize contamination in food packaging. As the use of plastic in food packaging continues to increase, it is vital to address nanoplastic contamination to ensure food safety and protect public health.
Source: https://www.earth.com/news/tea-bags-release-millions-of-plastic-particles-during-brewing