I, tea alkaloids have vasodilatation, increase cardiac output, so that the blood for effective circulation, especially theophylline has the role of smooth muscle relaxation, the use of which can expand the vascular muscle than the characteristics of the treatment of hypertensive headache.

The tea polyphenols in tea, especially catechins have a strong lipid-lowering function and can effectively protect the capillaries, so that the blood vessel wall relaxation, the effective diameter increases, the elasticity of the enhancement, and even in the blood vessel is damaged, the tea polyphenols can make the function of the blood vessel is restored. Favorable to the human vascular diastole, enhance the elasticity and toughness of the microvascular, and play a role in preventing cardiovascular and cerebrovascular.