Tea is a true stimulant, because of the caffeine it contains.
Caffeine stimulates the central nervous system and blood circulation. It helps muscles relax and influences the metabolic process of all body cells. Tea also has an effect of blood vessel dilation and prevent from the cardiovascular and coronary diseases. Tea is used to cure angina pectoris and myocardial infarction. In clinics, tea is used to cure cold and headache with no adverse side-effects.