Drinking Green Tea May Halve The Colorectal Cancer Risk
The results add to an ever-growing body of science linking consumption to a
wide range of health benefits, including lower risk of certain cancers, increased
weight loss, improved heart health, and protection against Alzheimer\\\'s.
tea contains between 30 and 40 per cent of water-extractable polyphenols, while
black tea (green tea that has been oxidized by fermentation) contains between
3 and 10 per cent.
The four primary polyphenols found in fresh tealeaves
are epigallocatechin gallate (EGCG), epigallocatechin, epicatechin gallate, and
The new study, published in the journal Cancer Epidemiology
Biomarkers & Prevention, looked at the link between green tea consumption and
the risk of colorectal cancer (CRC) among 69,710 Chinese women aged between 40
There are 363,000 new cases of colorectal cancer every year in
Europe, with an estimated 945,000 globally. About 492,000 deaths occur from the
cancer each year.
Lead author Gong Yang from Vanderbilt University School
of Medicine and co-workers from Shanghai Cancer Institute, and National Cancer
Institute, National Institutes of Health, followed the subjects for six years
and identified 256 incident cases of CRC.
Regularly drinking tea at baseline
was associated with a 37 per cent risk reduction, compared to irregular tea consumption.
The researchers found the reduction in risk to be related to the dose of
tea regularly consumed, and the duration of lifetime tea consumption.
reduction in risk was most evident among those who consistently reported to drink
tea regularly at both the baseline and follow-up surveys (risk reduction of 57
per cent),\\\" wrote Yang and co-workers.
\\\"This study suggests that regular
consumption of green tea may reduce CRC risk in women,\\\" they concluded.
demand for tea extracts is currently surging, and this has seen companies such
as DSM, with its Teavigo boasting 95 per cent purity of EGCG, and Taiyo International,
with its Sunphenon claiming more than 90 per cent purity, position themselves
firmly in specific catechin markets
Source: Cancer Epidemiology Biomarkers
& Prevention Volume 16, Pages 1219-1223, doi: 10.1158/1055-9965.EPI-07-0097 \\\"Prospective
Cohort Study of Green Tea Consumption and Colorectal Cancer Risk in Women\\\" Authors:
G. Yang, X.-O. Shu, H. Li, W.-H. Chow, B.-T. Ji, X. Zhang, Y.-T. Gao and W. Zheng
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