The stomach cancer prevention effect of green tea is spoilt because of smoking.

It would extend to 37,000 men and women of 40-69 years who lived in the public health center jurisdiction to be surveyed in 1990 and 1993 by 2004, the follow-up survey was done, and the person who had not gotten a stomach cancer compared the number of this people in which conditions of the age and sex, etc. were matched in the choice objects about the densities of the catechin in blood of 494 patients who had gotten stomach cancers for the period with the investigation now.

Then, it turned out the woman with a thick element named three epicatechin Garat (ECG) that the stomach cancer generation risk fell as many as 70 percent in four kinds of detected catechins (green tea polyphenol). the more maximum than usual peopleHowever, such an effect is not seen in the man, and the result in which improving the risk oppositely according to circumstances (About twice at kind EGC Epigarocatekin of the catechin when it is high density) comes out.

Then, when having compared it with the smoker by the person who had the experience of smoking in the nonsmoker and the past, the result of the survey "A high density nonsmoker = catechin was reduced the stomach cancer risk" and "A high density smoker = catechin rises the stomach cancer risk" was clarified.

Density and stomach cancer risk of ECG (3 epicatechin Garat) in blood in which it smokes

This result of the survey is received in the research group, and the catechin, smoking, and the stomach cancer risk in green tea have been brought together as follows.

*The man and woman difference's being seen has the possibility that smoking influences very much. (The smoking rate of a man middle and advanced age is high. )
*The smoker is made to promote it oppositely though the effect of preventing the stomach cancer generation by green tea is seen when the cigarette is smoked.
*It is still immediate to have to consider the relation between the catechin and Helicobacter Pylori, and to declare the interpretation this "Smoking ruins the stomach cancer controlling effect of green tea".
*However, the person who thinks about "Prevent it the stomach cancer with green tea" will stop smoking because it has gone out as data.

This investigation was an analysis from a statistics to the last district, and working for the structure and the function of the polyphenol of green tea (catechin) to suppress the stomach cancer to concrete, and to make it promote by smoking was not found. However, because a lot of tendencies by the people are found, the reason is high the possibility that is the correct answer it even if it doesn't understand.

To suppress the stomach cancer for the time being, green tea should be loved, and the cigarette be stopped though there are various one in "Cancer" besides the stomach cancer.