The most potent molecule of green tea, epigallocatechin gallate (EGCG) inhibits viral attachment to the HCV cell and EGCG potently inhibits HCV infection process. Green tea catechins, such as EGCG and its derivatives support normal cell growth and they have protective effects against several kinds of cancer. It can be indicated in chronic hepatitis C infection, prevention and treatment of tumors and can also be used for reduction of body fat.