Green tea and risk of breast cancer in Asian Americans

  title={Green tea and risk of breast cancer in Asian Americans},
  author={Anna H Wu and MimiC. Yu and Chiu‐chen Tseng and Jean H. Hankin and Malcolm C. Pike},
  journal={International Journal of Cancer},
  • A. Wu, M. Yu, M. Pike
  • Published 10 September 2003
  • Medicine
  • International Journal of Cancer
There is substantial in vitro and in vivo evidence implicating tea polyphenols as chemopreventive agents against various cancers. However, epidemiologic data obtained from mainly Western populations are not supportive of a protective role of tea, mainly black tea, in the etiology of breast cancer. Much less is known about the relationship between green tea and breast cancer risk. During 1995–1998, we conducted a population‐based, case‐control study of breast cancer among Chinese, Japanese and… 

Tea intake, COMT genotype, and breast cancer in Asian-American women.

In conclusion, tea catechins appeared to reduce breast cancer risk in this study of Asian-American women, and reduction in risk was strongest among persons who had the low activity COMT alleles, suggesting these individuals were less efficient in eliminating teacatechins and may derive the most benefit from these compounds.

Green tea and the prevention of breast cancer: a case-control study in Southeast China.

Regular consumption of green tea can protect against breast cancer, and dose-response relationships were observed for duration of drinking green tea, number of cups consumed and new batches prepared per day.

Drinking green tea modestly reduces breast cancer risk.

Drinking green tea may be weakly associated with a decreased risk of breast cancer, and the COMT rs4680 AA genotypes did not have a modifying effect on the association of green tea intake with breast cancer risk.

Tea and circulating estrogen levels in postmenopausal Chinese women in Singapore.

The relationship between tea intake, and plasma estrogen and androstenedione levels in a cross-sectional study of healthy postmenopausal Chinese women in Singapore found that the tea-estrogen associations were observed irrespective of the genotype of catechol-O-methyltransferase (COMT), a major enzyme that aids in the excretion of tea polyphenols in humans.

Green tea drinking and subsequent risk of breast cancer in a population to based cohort of Japanese women

No inverse association was found regardless of hormone receptor-defined subtype or menopausal status and green tea drinking and risk of breast cancer was found in this population-based prospective cohort study in Japan.

Green Tea Consumption and Breast Cancer Risk in Japanese Women: A Case-Control Study

There is additional evidence that green tea consumption is not associated with a decreased risk of breast cancer, and no substantial effect modification was observed for menopausal status, 4 SNPs, or dietary intake of folate or isoflavone.

Green tea, black tea and breast cancer risk: a meta-analysis of epidemiological studies.

The results of this meta-analysis indicate a lower risk for breast cancer with green tea consumption and available data suggest a possible late-stage, promotional effect of black tea on breast carcinogenesis.

Green tea and breast cancer.

  • A. WuL. Butler
  • Medicine, Biology
    Molecular nutrition & food research
  • 2011
The human studies that have evaluated the relationship between green tea intake and four biomarkers that are believed to be important in breast cancer development are reviewed, finding results from these biomarker studies are inconclusive.

Dietary intakes of mushrooms and green tea combine to reduce the risk of breast cancer in Chinese women

Higher dietary intake of mushrooms decreased breast cancer risk in pre‐ and postmenopausal Chinese women and an additional decreased risk of breast cancer from joint effect of mushrooms and green tea was observed.



Adolescent and adult soy intake and risk of breast cancer in Asian-Americans.

Results show that high soy intake in childhood in Asian-Americans is associated with reduced breast cancer risk, and risk may be further reduced by intake as an adult.

Consumption of black tea and cancer risk: a prospective cohort study.

This investigation does not support the hypothesis that consumption of black tea protects against four of the major cancers in humans; a cancer-enhancing effect was not evident, either.

Tea consumption and cancer incidence in a prospective cohort study of postmenopausal women.

It is suggested that tea, one of the most popular beverages consumed worldwide, may protect against some cancers in postmenopausal women.

Influence of Drinking Green Tea on Breast Cancer Malignancy among Japanese Patients

The results indicate that increased consumption of green tea prior to clinical cancer onset is significantly associated with improved prognosis of stage I and II breast cancer, and this association may be related to a modifying effect of green Tea on the clinical characteristics of the cancer.

Breast cancer and the consumption of coffee.

Coffee consumption was not associated with an increase in the risk of breast cancer among women with a history of fibrocystic breast disease, nor were tea or decaffeinated coffee associated with a increase inThe risk of Breast cancer.

Tea and cancer.

A critical review of the relationship between tea consumption and human cancer risk is provided, covering basic chemistry and biochemical activity of tea, epidemiologic investigations, and laboratory studies, as well as possible directions for future research.

Urinary tea polyphenols in relation to gastric and esophageal cancers: a prospective study of men in Shanghai, China.

There is direct evidence that tea polyphenols may act as chemopreventive agents against gastric and esophageal cancer development and protective effect was primarily seen among subjects with low (below population median) serum carotenes.

Coffee consumption and the risk of breast cancer.

It is suggested that coffee consumption does not increase the risk of malignant neoplasms of the breast and duration of consumption or use of other methylxanthine-containing beverages.

Soya foods and breast cancer risk: a prospective study in Hiroshima and Nagasaki, Japan

The association between soya foods and breast cancer risk was investigated in a prospective study of 34 759 women in Hiroshima and Nagasaki, Japan and results were similar in women diagnosed before age 50 and at ages 50 and above.