Tea consumption and cancer incidence

Zheng, W., Tea consumption and cancer incidence in a prospective cohort study of postmenopausal women, Am J Epidemiol, 144, 175, 1996. 

In another cohort study of a Japanese population, researcher surveyed more than 8000 individuals over 40 years of age on their living habits, including daily consumption of green tea. Results found a negative association between green tea consumption and cancer incidence, especially among females drinking more than 10 cups per day [212]. 

Yu, G.P. et al., Green-tea consumption and risk of stomach cancer a population-based case-control study in Shanghai, China, Cancer Causes Control, 6, 532, 1995. Zheng, W. et ah, Tea consumption and cancer incidence in a prospective cohort study of postmenopausal women, Am, J. Epidemiol., 144, 175, 1996. 

The cancers that exhibited a significant inverse relationship between green tea consumption and disease incidence are colon, rectal, pancreatic, stomach, ovarian, and gastrointestinal tract cancers. In most of the cases, the epidemiological data were... 

Michels, K.B., Holmberg, L., Bergkvist, L., Wolk, A., Coffee, tea, and caffeine consumption and breast cancer incidence in a cohort of Swedish women, Epidemiol., 12,21-26,2002. 

As the largest study ever undertaken to study the relationships between dietary habits and disease states including cancer, The European Prospective Investigation into Cancer and Nutrition found a reverse correlation between fluid intake and bladder cancer frequency [30]. As expected, higher caloric intake was correlated with higher incidence of bladder cancer in men older than 60 [31]. Similar results were obtained with fruit and vegetable, green tea polyphenol, and vitamin supplement consumption, despite the fact that the results were sometimes unexpected for different cancer cases [32-34]. 

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