Several studies have shown that tea bags, especially nylon or polypropylene tea bags, release microplastic and nanoplastic particles into the water during brewing.

According to one study, just one cup of tea can release millions of microplastic particles into the water.

These particles can enter the human body and reach the blood, liver, or brain and can be harmful to health in the long term.
Potential effects include hormonal imbalance, digestive disorders, inflammation, and cancer risks.
Experts have suggested using loose-leaf tea instead of tea bags with nylon or plastic seals.