Bubble tea can contain carcinogens, researchers claim

Bubble tea — that sweet, tea-based drink filled with giant tapioca balls — may be a hazard to your health.

A new German study finds the starchy balls can contain cancer-causing PCBs, a group of of industrial chemicals that have been linked to a long list of health hazards. Meanwhile, a German government group is warning the drinks could pose a choking hazard.

German researchers from the University Hospital Aachen tell the German newspaper the Rheinische Post that they conducted a study on bubble teas, using samples from an unnamed bubble tea chain in Germany.

They say all the tapioca bubbles used in the teas were manufactured in Taiwan and many contained traces of PCBs, or polychlorinated biphenyls.

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