Bubble Tea Risks: Lead, Kidney Stones 

Bubble tea — the colour-swirled, chewy-pearl drink that’s everywhere — might feel like a harmless treat, but new research suggests there’s more going on beneath its sweet surface. First, the tapioca pearls are often made from cassava, a root that readily absorbs heavy metals like lead from the soil. Research in the US found elevated lead levels in some tapioca-based boba products. 

Beyond contamination, several health issues are emerging. One reported case involved a young woman in Taiwan who developed over 300 kidney stones after relying heavily on bubble tea instead of water. The high sugar content (20–50g per cup) and thick tapioca pearls may contribute to metabolic issues, digestion delays (gastroparesis) or choking hazards. 

Medical scans have even mistaken dense tapioca pearls for kidney or gall stones because the pearls show up similarly on imaging. All this doesn’t necessarily mean you must quit bubble tea forever — but it does suggest it’s wise to treat it as an occasional indulgence, not a daily habit. A healthier approach: moderate the sugar, choose pearls sparingly, and ensure you also stay hydrated with water.

Key Takeaways:

The tapioca pearls in bubble tea can carry elevated lead levels because cassava absorbs heavy metals from soil.

Excessive bubble tea consumption has been linked to kidney stones, digestive delay and choking hazards due to sugar load and tapioca structure.

Enjoy bubble tea—but as an occasional treat. Lower-sugar versions, fewer pearls and better hydration are smart moves.

Link to original article: 

https://theconversation.com/bubble-teas-dark-side-from-lead-contamination-to-kidney-stones-266299