New Study Raises Health Concerns Over Popular Bubble Tea - Video

Bubble tea’s colorful presentation and chewy tapioca pearls have made it a global sensation since its origins in 1980s Taiwan. Now widely available across the world, the drink typically combines black tea, milk, sugar, and cassava-based pearls. However, growing evidence suggests this sweet treat may carry health risks that are often overlooked.

An investigation by Consumer Reports found elevated lead levels in some bubble tea products sold in the United States. Tapioca pearls are made from cassava starch, and cassava plants can absorb heavy metals such as lead from contaminated soil. This raises concerns about potential long-term exposure, particularly for frequent consumers.

Digestive complications are another issue. Because the pearls are dense and starchy, consuming large quantities may slow stomach emptying, potentially contributing to gastroparesis or, in rare cases, intestinal blockage. Symptoms can include nausea, vomiting, and abdominal pain, especially in people with pre-existing digestive conditions. For young children, the pearls pose a well-documented choking hazard, and isolated adult cases have also highlighted the danger of inhaling them through wide straws.

Sugar content presents perhaps the most consistent concern. A single serving can contain 20 to 50 grams of sugar—comparable to or exceeding the 35 grams found in a can of Coca-Cola. Regular consumption has been linked to higher risks of obesity, type 2 diabetes, dental cavities, and fatty liver disease. Some studies have also reported associations between frequent intake and anxiety or depression, though causation remains unclear.

While occasional enjoyment is unlikely to cause harm, moderation is key. Choosing reduced sugar options, limiting pearl quantity, and avoiding excessive intake may help reduce potential risks.

REFERENCE: The Conversation. "Is bubble tea bad for you? New research raises red flags." ScienceDaily. ScienceDaily, 1 March 2026. .