Summary Avoiding microwaving tea and using filtered water may further limit contamination.
(Web Desk) - Tea bags could be leaching billions of plastic particles into every cup – sparking fears of potential health risks.
Scientists warn that the microscopic fragments, known as microplastics and nanoplastics, can lodge in the body after being consumed.
While the long-term impact is still being studied, early evidence has linked exposure to potential cancer-related effects, as the tiny particles get lodged in the body's tissues.
Now, new research suggests the everyday teabag may be a major hidden source.
An analysis of 19 studies by researchers in Iran and the UK found a single dry teabag can contain around 1.3 billion plastic particles – rising to about 14.7 billion once brewed, as hot water breaks them into even smaller pieces.
Tests showed nylon and PET teabags released especially high levels when steeped in near-boiling water.
Experts say the particles may come from the bag material itself, chemicals leaching out, or contamination during production – but the precise source remains unclear.
Other drinks are also affected. Bottled tea can pick up plastics from the water, bottle and cap, while bubble tea may be contaminated by cups, lids, straws and added ingredients.
There are, however, simple ways to cut exposure.
Experts say the most effective step is to switch to loose-leaf tea, which avoids the bag altogether. Choosing paper teabags rather than plastic mesh can also help.
Some studies suggest rinsing teabags before use can reduce the number of particles released – though this is less effective for nylon varieties.
Avoiding microwaving tea and using filtered water may further limit contamination.
While it is impossible to eliminate microplastics entirely, researchers say small changes like these can significantly reduce how much ends up in a daily cup.
Microplastics are now widespread in food, water and even human tissues, with researchers racing to understand what that means for long-term health.
