
Epigallocatechin gallate (EGCG) is a catechin monomer isolated from tea leaves, It is a tea extract with the molecular formula C22H18O11. As the main component of green tea polyphenols, EGCG has the highest content among catechins, accounting for 9%-13% of the gross weight of green tea. It is not only the core substance of green tea activity, but also one of the most promising special chemical substances in tea. EGCG is a white powdery phenolic acid compound with a purity usually higher than 99%, and the detection method is HPLC. EGCG has a stable chemical structure and is a very strong antioxidant raw material. Its antioxidant capacity is at least 100 times that of vitamin C and 25 times that of vitamin E. This powerful antioxidant capacity enables EGCG to protect cells and DNA from damage, which is closely related to major diseases such as cancer and heart disease. Therefore, it can be widely used as pharmaceutical raw materials and food additives.
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