In part three of my look at green tea’s powers, we’ll address the evidence for its use against lung and ovarian cancers.
A population study in China involved 254 patients with ovarian cancer and 652 healthy people. It showed that green tea was significantly linked to a reduced risk of ovarian cancer. This risk decreased more the more people drank green tea. Moreover, there was a stronger link for those with advanced ovarian cancer — meaning that green tea could help prevent the very bad tumors.
Similar results were obtained in a Swedish study involving 61,057 otherwise healthy women between the ages of 40 and 76 who were followed for 15 years. It found that each extra cup of tea per day was associated with an 18% lower risk of ovarian cancer.
Green tea may battle the most fatal cancer of all. In another population study, 649 women with lung cancer were matched with 675 healthy women. This study showed that, among nonsmoking women, green tea was linked with a reduced risk of lung cancer. And, the more tea consumption increased, the more this risk decreased.
Smoking is known to increase the risk of lung cancer, likely due to more free radicals that cause DNA damages in the cells. The amount of DNA damage can be measured by a substance called “urinary 8-hydroxydeoxyguanosine” (8-OHdG).
In this study, a total of 143 heavy smokers were randomized to drink green tea, black tea, or just water. The urinary 8-OHdG significantly decreased by 31% after four months drinking decaffeinated green tea. This suggests that regular green tea drinking might protect the smokers from free radical damage and may reduce the lung cancer risk.
In short, there is very suggestive evidence that the ancient beverage green tea could battle the most modern-day medical issues.