Green Tea and Coffee Cut Type 2 Diabetes Risk

Study finds link between reduced risk and six or more cups of green tea, or three or more cups of coffee each day

MONDAY, April 24 (HealthDay News) -- Drinking green tea and coffee is associated with a reduced risk for type 2 diabetes, a finding that is especially pronounced in women and overweight men, according to a study of Japanese adults reported in the April 18 issue of the Annals of Internal Medicine.

Hiroyasu Iso, M.D., of Osaka University in Japan, and colleagues surveyed 17,413 Japanese adults aged 40 to 65 about lifestyle issues and their consumption of coffee, black tea, green tea and oolong teas. None of the participants originally had type 2 diabetes, heart disease or cancer.

Five years later, 231 of the men and 213 of the women reported being diagnosed with diabetes. Compared with those who drank less than one cup of coffee or green tea a week, the odds ratio for developing diabetes was 0.67 for those drinking six or more cups of green tea each day, and 0.58 for those drinking three or more cups of coffee per day.

Drinking black or oolong teas, however, appeared to have no impact on diabetes risk.

"Consumption of green tea, coffee and total caffeine was associated with a reduced risk for type 2 diabetes," the authors conclude.

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