Do you use tea bags? Study reveals several hidden dangers that can affect cell nuclei, genes

A recent study by the Autonomous University of Barcelona, published in Chemosphere, highlights a significant health concern for tea drinkers. Polymer-based tea bags, commonly made from materials like nylon-6, polypropylene, and cellulose, release billions of microplastics and nanoplastics (MNPLs) into hot water during brewing. These particles can enter the human bloodstream and be absorbed by intestinal cells, posing potential health risks.

The study found that polypropylene tea bags released around 1.2 billion particles per milliliter, while cellulose and nylon-6 released 135 million and 8.18 million particles per milliliter, respectively. Researchers used advanced techniques to characterize these pollutants and studied their interaction with human intestinal cells.

Health implications of microplastics

Researchers observed that intestinal cells absorbed significant amounts of MNPLs within 24 hours of exposure. Alarmingly, these particles were found in the nuclei of some cells, potentially affecting genetic material. UAB researcher Alba Garcia remarked, “We have managed to innovatively characterize these pollutants with a set of cutting-edge techniques, which is a very important tool to advance research on their possible impacts on human health.”


This study underscores the risks posed by cumulative exposure to microplastics, especially for individuals frequently handling food or drink packaging. Digestive mucus, which aids in nutrient absorption, appears to play a role in transporting these particles into the body.

Reducing microplastic exposure in tea

Tea enthusiasts can mitigate microplastic exposure by adopting safer practices:

Use loose-leaf tea: Replace polymer-based tea bags with loose-leaf tea.
Opt for natural materials: Choose tea bags made from paper or cotton.
Brew with filtered water: Filtered water reduces additional contaminants.
Avoid handling tea bags excessively: Avoid squeezing or tearing tea bags.

Health benefits of tea

Despite these findings, tea remains a beneficial beverage when consumed mindfully. It is rich in antioxidants, supports heart health, aids digestion, enhances focus, and may assist in weight management. Herbal teas like ginger and peppermint offer additional digestive benefits.

Consumers are advised to prioritize natural materials and avoid plastic-based packaging. Proactive choices, such as using glass containers and avoiding plastic items for children, can further reduce exposure to microplastics. While tea offers numerous health benefits, caution is necessary to ensure safe consumption practices.

(Disclaimer: This article is for informational purposes only and not a substitute for professional medical advice. Always seek the advice of your doctor with any questions about a medical condition.)