Caffeine free. Dandelion root tea has shown “choleretic” effects, which means that it can stimulate the liver to increase bile flow. Once bile is released by the liver, its two main functions are to carry away waste and to break down fats during digestion. Dandelion’s beneficial effects on liver and biliary tract function have been proven in pharmacological studies. Dandelion root tea has a pleasant roasted taste, sweet and slightly bitter.