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What is the health function of black tea?

Fermented Chinese Black Tea.jpgThe role of black tea in lowering blood pressure has long been reported. Japan reported that the unique amino acid theanine in black tea can inhibit the increase of blood pressure by activating dopaminergic neurons. Here, it has also been found that caffeine and catechins in tea leaves can relax the blood vessel wall, increase the effective diameter of the blood vessel, and lower blood pressure by vasodilation. China Fuqing et al found that tea pigment has significant anticoagulant, promotes fibrinolysis, prevents platelet adhesion and aggregation, inhibits the proliferation of arterial smooth muscle cells, and significantly reduces triglyceride and low-density lipoprotein in serum of high-fat animals. High-density lipoprotein in serum has a significant inhibitory effect on ACE enzyme and has a hypotensive effect.


The tea polysaccharide complex in black tea is the main component of blood sugar lowering. Tea polysaccharide complexes, commonly referred to as tea polysaccharides, are a complex and varied mixture of components. The results of tea polysaccharide content determination of several teas showed that black tea had the highest tea polysaccharide content and its component activity was stronger than other teas, because in the fermented tea, due to glycosidase, protease, hydrolase The role of the relatively short length of the sugar chain and the peptide chain, the longer peptide chain of the short peptide chain is more easily absorbed, and the biological activity is stronger, which may be the fermented tea, especially the black tea tea polysaccharide has excellent blood sugar lowering effect.


The main components of black tea soup color are theaflavins and thearubigins. Studies have shown that theaflavins are not only an effective free radical scavenger and antioxidant, but also have obvious antibacterial effects against B. botulinum, Enterobacter, Staphylococcus aureus, Clostridium, and Bacillus cereus. In addition, theaflavins have a certain inhibitory effect on the invasion of influenza virus and the infection of rotavirus and enterovirus.