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Green and Oolong Teas Reduce Risk of
Hypertension
Participants: 1507 people, age 20+, who
did not have a history of high blood pressure, were tracked for several years in
this study of the effects of green and oolong tea on the development of high
blood pressure. Of this group, 600 were habitual tea drinkers, which was defined
as tea consumption of more 1/2 cup per day for at least a year.
Where: Taiwan
Type of study: Cohort
Study Methods: The health and lifestyle
habits and amount of tea consumption of all participants were tracked for
several years, and the development of high blood pressure was noted.
What happened: Compared with non-habitual
tea drinkers, those who drank between 1/2 and 2 1/2 cups of oolong or green tea
per day for a year were 46% less likely to develop high blood pressure. And
those who drank more than 2 1/2 cups per day for a year were 65% less likely to
develop high blood pressure.
Researchers' conclusion: "Habitual
moderate strength green or oolong tea consumption, 120 mL/d [4 oz./day] or more
for 1 year, significantly reduces the risk of developing hypertension in the
Chinese population."
Citation: Yang YC, Lu FH, Wu JS, et al.
The protective effect of habitual tea consumption on hypertension. Archives
of Internal Medicine 2004;164(14):1534-40. (Click
here to read PubMed study abstract.)
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Nadine Taylor, M.S., R.D. presents
GreenTeaLibrary.com,
the most comprehensive collection of scientific information
describing the health benefits of green tea.
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