Plastic Tea Bags Release Microplastics Into Drinks
A study in npj Science of Food found that tea bags made of plastic shed microplastic particles and chemical compounds into steeped tea.
Updated on Nov. 2, 2026 in Tea
Live Poll
Would you switch from plastic tea bags to loose leaf tea after this study?
Researchers reported in npj Science of Food that plastic tea bags release microplastic particles into drinks, with four brands releasing between 555 and 2,498 particles per cup on average. The team also detected bisphenol A and plasticizer compounds in all samples of tea prepared with plastic tea bags.
Why it matters
The findings raise questions about everyday exposure to microplastics and chemicals through a common beverage preparation method. Because the study did not directly measure health effects, the practical significance for consumers remains an open question.
Tea bags from four brands released between 555 and 2,498 microplastic particles per cup when steeped for three minutes in 95-degree Celsius water, and BPA ranged from 4.55% to 21.70% of the tolerable daily intake. Loose leaf tea contained between 146 and 1,178 microplastic particles per kilogram, and the study did not directly measure health effects.
The details
Researchers steeped tea bags for three minutes in water at 95 degrees Celsius and analyzed the resulting drinks, detecting bisphenol A and plasticizer compounds in every sample prepared with plastic tea bags. Loose leaf tea was not prepared in the same way, so comparisons between the two formats are limited.
Timeline
November 2, 2026: Article published reporting on the plastic tea bag microplastics study.
Big Picture
Plastic tea bags add to a growing body of research on microplastics in food packaging, with BPA exposure measured against established tolerable daily intake limits. The findings place a common kitchen habit within existing regulatory frameworks for BPA and plasticizers.
If you use plastic tea bags, the study suggests that switching to loose leaf tea or tea bags made of other materials could reduce exposure to microplastics and certain chemicals. Loose leaf tea contained fewer particles per serving than plastic tea bags in the study, though the researchers note that more work is needed.
The takeaway
The study points to tea bag material as a factor in what enters a cup of tea, and it highlights the need for direct health research before drawing conclusions about risk. Choosing tea bag materials and preparation methods is one practical step readers can consider while that research continues.
Further reading
Explore more on Tea for broader context on how brewing methods affect what ends up in the cup.
Live Poll
Would you switch from plastic tea bags to loose leaf tea after this study?
