A team of scientists from McGill University in Canada say the a plastic tea bag brewing in 95C temperatures releases a staggering 11.6 billion microplastics into one single cup.
These tiny microplastics - at levels higher than other foods and drinks - are then consumed.
Nathalie Tufenkji, from the university, told New Scientist: “We think that it is a lot when compared to other foods that contain microplastics.
“Table salt, which has a relatively high microplastic content, has been reported to contain approximately 0.005 micrograms plastic per gram salt.
“A cup of tea contains thousands of times greater mass of plastic, at 16 micrograms per cup.”
Read more from Yahoo News UK:
Despite the alarming results, the World Health Organisation (WHO) say that there is no evidence that these microplastics are harmful to humans.
However, Tufenkji recommended opting for paper tea bags or loose tea rather than the single-use plastic variety.