Hot drinks may increase risk of cancer, says study
This article was translated by an automatic translation system, and was therefore not reviewed by people.
A search of the University of Tehran suggests that consumption of beverages excessively hot, 70 degrees Celsius or more, may increase the risk of cancer in the esophagus.
Experts say that the discovery may explain the increased risk of esophageal cancer among people in countries outside the West.
The cancer in the esophagus, the muscular tube that carries food from the throat to the stomach, killing more than 500 thousand people worldwide per year and squamous cell carcinoma of the esophagus (OSCC, the acronym in English) is the most common type.
Cigarettes and alcohol are the main factors related to the development of esophageal cancer in the countries of Europe and America.
But I still did not know the reason for other people in the world have high rates of disease, although a theory exists that links regular consumption of very hot beverages to damage the internal lining of the esophagus.
The research was published in the magazine, "British Medical Journal."
The province of Golestão, in northern Iran, is one of the highest rates of OSCC in the world, but the rates of consumption of cigarettes and alcoholic beverages are low and women have equal chances of being diagnosed with the disease than men. But the consumption of tea is very popular in the region.
Researchers at the University of Tehran studied the habits of consumption of tea among 300 people diagnosed with the disease and compare these data with a group of 570 people who lived in the same area.
Almost all participants drank black tea regularly, more than one liter per day on average.
The consumption of hot tea or warm (65 degrees or less) was associated with twice the risk of cancer in the esophagus. The consumption of tea too hot (70 degrees or more) was linked to increased risk of disease in eight times.
The speed with which people took the tea was also considered important.
Drinking a cup of tea in less than two minutes after the water was discharged was associated with a five times greater risk of cancer, compared with the consumption of tea at four or more minutes later.
There was no association between the quantity of tea consumed and risk of disease.
"Our results showed a remarkable increase in the risk of OSCC with the consumption of hot tea," the article said the researchers led by Professor Reza Malekzadeh, the British Medical Journal.
"A large proportion of the inhabitants of Golestão drink hot tea, then this habit may be responsible for a significant proportion of cases of cancer of the esophagus in
population.
Due to the fact that the researchers had counted only with the impressions of the volunteers who participated in the study to know how hot the drink was consumed, they had to measure the temperature of the tea drunk for about 50 thousand residents of the area.
And the temperature varied between 60 degrees Celsius to more than 70 degree. The temperature reported by participants and the actual temperature were similar.
David Whiteman, Institute of Medical Research in Queensland, Australia, advised people to wait a few minutes before consuming the tea "boiling", to drink at a "tolerable".
"The mechanism by which heat promotes the development of tumors leads to the need for more research, which should receive a new impetus from these discoveries," he added.
To Oliver Childs, spokeswoman of the charity Cancer Research UK UK, consumption of tea is part of many cultures and these results certainly do not indicate that the problem is the tea itself. "
"But (the study) gives us more evidence that a habit of eating very hot food and drink may increase the risk of developing cancer in the esophagus," he said.
Source: BBC
This article was translated by an automatic translation system, and was therefore not reviewed by people.
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