This tea increases the rate of metabolism. The polyphenol found in it works to intensify level of fat oxidation and the rate at which your body burns food. It also helps regulate glucose levels showing the rise of blood sugar after eating, this can prevent high insulin spikes. The antioxidant "catechin" in the tea can destroy bacteria and viruses that cause throat infection and other dental conditions. It protects the brain cells from dying. It can improve the amount of blood pumped out of the heart during contraction.