Tea has potential in the prevention or adjuvant treatment of several diseases including cancer, cardiovascular diseases and obesity …. green tea drinking decreased gastric cancer by 40% …. protective effect of green tea not only against stomach cancer, but also against chronic gastritis …. among non-smoking women, consumption of green tea was associated with a reduced risk of lung cancer and the risk decreased with increasing green tea consumption …. green tea had a protective effect on oesophageal cancers among alcohol drinkers (risk reduction by 39%) and cigarette smokers (risk reduction by 31%)