A new study from the University of Queensland reveals that boiling water in new plastic kettles can release billions of nanoplastics into your cup of tea. Researchers found that the first boil in a polypropylene kettle releases nearly 12 million nanoparticles per milliliter, totaling about 3 billion particles in a standard cup.
Lead researcher Elvis Okoffo says the study highlights a daily source of plastic exposure for millions. The team recommends boiling and discarding water several times before first use to reduce shedding. Hard tap water also helps by forming a mineral coating inside the kettle that traps plastics. While plastic release drops significantly after 10 boils, low levels persist even after 150 boils.
The researchers are calling for clearer product labeling and safety guidelines. Though the full health risks remain under study, past research links microplastics to gut, lung, and neurological issues.