Are Your Tea Bags Leaching Microplastics?

Every time you steep a nylon tea bag in boiling water, you are likely brewing a dose of microplastics. A 2026 study published in the Journal of Hazardous Materials found that these bags shed particles with a mean diameter of 389.7 nm directly into your drink. These aren't just inert bits of plastic. They are active pollutants.

When researchers exposed zebrafish embryos to these teabag-derived microplastics, the results were clear. They observed up to 45% mortality and significant developmental defects. The study, which you can read here, confirmed that these plastics trigger oxidative stress and lipid accumulation, or steatosis. The particles also leach styrene, a chemical that binds to your body's stress-response genes.

You don't have to stop drinking tea. You just have to stop using plastic bags. Switch to loose-leaf tea and a stainless steel infuser to avoid the heat-induced breakdown of synthetic materials. It is a simple swap that keeps your morning ritual clean. Check out our non-toxic kitchen alternatives to find plastic-free ways to brew your next cup.

Source: Naser SS, Sahu RN, Lenka SS, Barik D, Kujawska M (2026). J Hazard Mater.