According to About.com, tapioca contains zero grams of fat and protein, making it a healthy natural starch extracted from the cassava root. Tapioca is also gluten-free, which allows it to be a healthy alternative for those who suffer with celiac disease.
The Huffington Post reports that tapioca used in boba tea may have aspolychlorinated biphenyls, a chemical that is linked to cancer and may have adverse effects on the nervous, endocrine, immune and reproductive systems. The chemical has no use in natural tapioca, is a man-made material and is banned in the United States. The contaminated tapioca was linked to manufacturers in Taiwan. The leading tapioca manufacturers have since disputed the finding, declaring the test methods as misleading.