Headline: Plastic Tea Bags Release Millions of Microplastics: New Study Warns of Health Risks
Subhead: Research from Barcelona’s Autonomous University uncovers the hidden hazards of commercial tea bags, as used packets release vast numbers of nanoplastics and microplastics that can enter our bodies.
Article:
In a alarming new discovery, scientists at Barcelona’s Autonomous University (UAB) have detailed how commercial tea bags made from polymers can release millions of microplastics and nanoplastics when infused. The study, published in the journal Chemosphere, marks the first time these tiny plastic particles have been shown to be absorbed by human intestinal cells, potentially entering the bloodstream and spreading throughout the body.
Microplastic pollution poses a critical environmental challenge, with growing implications for the health and well-being of future generations. Food packaging is a major source of micro- and nano-plastics (MNPLs) contamination and ingestion and inhalation are the main routes of human exposure.
The UAB research team successfully extracted and characterized micro- and nanoplastics from various commercially available tea bags. They found that infusing these tea bags results in the release of enormous quantities of nanoparticles and nanofilamentous structures, serving as a significant exposure route to MNPLs.
The tea bags studied were made from nylon-6, polypropylene, and cellulose. The results indicated that polypropylene tea bags released approximately 1.2 billion particles per milliliter, with an average size of 136.7 nanometers; cellulose bags released around 135 million particles per milliliter, averaging 244 nanometers; and nylon-6 bags released 8.18 million particles per milliliter, averaging 138.4 nanometers.
Interactions with Human Cells Observed for the First Time
The particles were stained and exposed to various types of human intestinal cells to assess their interaction and potential cellular internalization. The biological interaction experiments showed that mucus-producing intestinal cells had the highest uptake of micro- and nanoplastics, with particles even penetrating the cell nucleus that houses genetic material. This suggests a key role for intestinal mucus in the absorption of these polluting particles and underscores the need for further research into the long-term health effects of chronic exposure.
“The development of standardized testing methods to assess MNPL contamination released from food-contact plastic materials and the formulation of regulatory policies to effectively restrict and minimize this contamination is crucial,” researchers stress. “Given the increasing use of plastic in food packaging, it is vital to address MNPL contamination to ensure food safety and protect public health.”
The study was developed within the European project PlasticHeal, coordinated by Alba Hernández, lecturer at the UAB’s Department of Genetics and Microbiology. Researchers from the UAB Mutagenesis Group, including Alba García-Rodríguez, Ricard Marcos, and Gooya Banaei (lead author of the study), contributed, with the collaboration of researchers from the Helmholtz Centre for Environmental Research in Leipzig, Germany.
Worth a look