People who regularly drink green tea have lower rates of stomach, lung, esophageal, pancreatic and colon cancer than those who do not. Green tea polyphenols stimulate the production of important antioxidants and detoxifying enzymes that block cancerous changes. To get the full beneficial effects of green tea, you'd need to drink 5-10 cups daily or take green tea extract tablets
. One green tea extract tablet is the equivalent of 1- 1/2 cups of green tea.