Researchers from Tehran University of Medical Sciences interviewed 300 people with confirmed cases of esophageal squamous cell carcinoma, as well as 571 healthy people of similar backgrounds. They found esophageal cancer was eight times as common among people who drank "very hot" tea, compared to warm or lukewarm tea drinkers. They noteed that too-hot liquid could injure esophageal cells, paving the way for esophageal cancer.[1]
Past studies comparing adjacent tea drinking areas in Linxian, China and areas surrounding the Golestan province in Iran, showed temperature affects cancer rates. Esophageal cancer numbers rose in regions where people preferred their tea very hot, and dropped where tea was served at a cooler temperature. [2]
There was no association between the amount of tea consumed and risk of cancer. [3]
[2] Hot Tea, Coffee May Increase Throat Cancer Risk ABC News March 27, 2009
[1] Hot Tea May Raise Esophageal Cancer Risk WebMD March 26, 2009
[3] Drinking scalding tea increases the risk of throat cancer telegraph.co.uk 26 Mar 2009
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