Drinking Tea Case Study

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Drinking tea provides numerous health benefits, such as anti-aging from antioxidants, reduced risk of heart attack and stroke, and may even help lose weight. But drinking hot tea, in particular, may increase the chance of cancer of the esophagus, in people who smokes and drinks too much alcohol, according to a new study.

China is the largest consumer of tea in the world with about 1.6 million pounds per year. But in terms of individual rate, Turkey, Ireland, and the United Kingdom are the homes of the biggest tea drinkers on the planet. The average yearly consumption of tea in Turkey is nearly seven pounds, followed by Ireland with almost five pounds, and the UK with more than four pounds per person.

Tea is made from a plant species called Camellia sinensis. Almost every tea including black tea, green tea, and oolong is made from this plant. Black tea is made with fermented leaves of the plant, while oolong tea is from partially fermented
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Their observational study analyzed the data from more than 456,000 Chinese adults ages 30 to 79 who did not have cancer at the start of the study. The participants answered questions about their consumption of tea, alcohol, and cigarette. For nine years, the researchers followed the participants and monitored the ones who developed esophageal cancer. About 1,700 participants developed the disease.

Since the study is observational, the researchers were not able to determine the cause and effect. However, they hypothesized that hot tea can burn the lining of the esophagus which is already damaged by smoking and alcohol. The other possible reason is the inflammatory compounds that can form with the repeated irritation of the esophagus, contributing to cancer

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