Green tea is abundant in catechin, which has powerful antioxidant properties. Catechins found in tea are the most extensively studied flavonoids that show anti-invasive and antimetastatic activity. The primary catechin, EGCG, has an antioxidant activity about 25 to 100 times more effective that Vitamins C or E, and is a potent regulator of the signaling pathways that contribute to cancer metastasis.