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Tea Drinkers Enjoy Possible Health Benefits, Study Suggests
The world is full of tea drinkers. For many, they simply enjoy the taste. But new research suggests tea might help those who drink it live longer than those who do not.
Tea is known to contain helpful substances known to reduce inflammation. Past studies in China and Japan, where green tea is popular, have suggested several health benefits. Now, scientists say black tea may show similar benefits.
Scientists from the United States National Cancer Institute carried out the study. They examined years of data gathered about the tea drinking behavior of almost 500,000 adults in Britain for as many as 14 years. Black tea is the most common kind of tea in Britain.
The researchers adjusted for risks that individual may have related1 to health, living conditions, diet and lifestyle choices, as well as age, race and gender2.
The study found that high tea intake3 — two or more cups a day — was linked to a moderate4 benefit: a nine to 13 percent lower risk of death from any cause than non-tea drinkers.
The research was published in Annals of Internal5 Medicine. The scientists say the lowered risk of death held true for study subjects with heart disease6. However, researchers said there was no clear finding8 in connection with deaths from cancer. Researchers were not sure why. But, it is possible there were too few confirmed cancer deaths to measure, said Maki Inoue-Choi, who led the study.
All kinds of tea—green, black, oolong, and white—are produced from the Camellia sinensis plant using different methods.
Tea contains various elements, including polyphenols.
Experts at the U.S. National Institutes of Health say polyphenols are thought to be responsible for the health benefits that have traditionally been linked to tea, especially green tea.
Green tea is reported to improve mental ability, ease7 digestive problems and head pain, and help people with weight loss. Green tea has also been studied for possible protective9 effects against heart disease and cancer.
The study of British tea drinkers was based on observing people's behaviors and health. This kind of methodology cannot prove cause and effect.
"Observational studies like this always raise the question: Is there something else about tea drinkers that makes them healthier?" said Marion Nestle. She is a professor of food studies at New York University.
The study does not offer enough evidence to advise people to change their tea behaviors, said Inoue-Choi.
"If you drink one cup a day already, I think that is good," she said. "And please enjoy your cup of tea."
Words in This Story
inflammation - n. a bodily response to injury or disease in which heat, redness, and swelling10 are present
benefit - n. a good or helpful result or effect
adjust - v. to change (something) in a minor11 way to make it work better
gender - n. the state of being male or female12
diet - n. the food and drink that a person or animal usually takes
digestive - adj. relating to or functioning in the body's process of changing food into simpler forms that can be taken up and used
cup - n. a rounded container to drink from
1 related | |
adj.有关系的,有关联的,叙述的,讲述的 | |
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2 gender | |
n.(生理上的)性,(名词、代词等的)性 | |
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3 intake | |
n.吸入,纳入;进气口,入口 | |
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4 moderate | |
adj.适度的,稳健的,温和的,中等的;v.节制,使...稳定,使...缓和;n.稳健的人 | |
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5 internal | |
adj.内的,内部的;国内的,内政的 | |
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6 disease | |
n.疾病,弊端 | |
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7 ease | |
n. 安乐,安逸,悠闲; v. 使...安乐,使...安心,减轻,放松 | |
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8 finding | |
n.发现,发现物;调查的结果 | |
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9 protective | |
adj.防护的,保护的 | |
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10 swelling | |
n.肿胀 | |
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11 minor | |
adj.较小(少)的,较次要的;n.辅修学科;vi.辅修 | |
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12 female | |
adj.雌的,女(性)的;n.雌性的动物,女子 | |
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