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STUDY: Very hot drinks may increase cancer risk

2026-09-10 15:15:20Lifestyle SHKRUAR NGA REDAKSIA VOX

STUDY: Very hot drinks may increase cancer risk

Regularly drinking beverages such as tea and coffee at very high temperatures increases the risk of cancer of the food pipe or esophagus, known as esophageal cancer, a UK study suggests.

Researchers say the findings, from a study of nearly a million people, make this the largest study to date to determine the link.

In the study, people who drank their drinks "very hot" had a risk of cancer about three times higher than those who drank "warm" tea or coffee - although experts stress that the overall chances of developing this cancer are low.

Steamy hot liquid can damage the cellular lining of the food pipe on its way down to the stomach.

The Oxford University work, which is published in the International Journal of Cancer, defines any drink at 65 degrees Celsius or above as "very hot" and posing a potential risk.

Consuming six or more hot drinks a day also increases risk, according to data from 977,282 middle-aged men and women.

Although adding milk can cool drinks down a bit, a tea or coffee with milk can still be too hot, researchers say.

Tea prepared immediately after the teapot has been fully boiled reaches its boiling point, which is 100 degrees C. Once poured into a cup, this temperature drops to around 90 or 95 degrees C.

The advice is to wait a few minutes before drinking it, so that the drink can cool to a safer temperature.

Cancer Research UK says it is difficult to determine an exact time for how long a hot drink should be left to cool.

"But if you are concerned, we would suggest waiting until it is comfortable to drink, rather than drinking it while it is still too hot," the charity said.

Lead researcher Dr. Keren Papier said research in South America – where many people drink a very hot herbal drink called mate – had already shown a similar link between hot drinks and esophageal cancer.

But she said: "More research is now needed to identify the exact beverage temperatures associated with this increased risk."

A separate study of 118 young people who tried different black coffees several times found that most considered the drinks too hot only if the temperature was 70 degrees Celsius or above.

According to a manufacturer of to-go coffee mugs, the ideal temperature for hot coffee on the go is between 49 and 60 degrees Celsius.

If a barista wants the coffee to stay hotter for longer – if a customer requests extra hot – it can be served at over 82 degrees C, says MTPak Coffee.

Low overall risk

Researchers suggest that around one or two in every 10 esophageal cancers could be avoided if people stopped drinking very hot drinks.

Squamous cell cancer of the oesophagus is rare, affecting just a few thousand people a year. In the UK, around 1% of the population has a lifetime risk of being diagnosed with this type of cancer.

So even if scalding hot drinks may increase someone's risk, the chances of them developing cancer are still low.

And there are other factors, such as smoking, which are a greater risk for esophageal cancer.

Fiona Osgun from Cancer Research UK, which funded the study, stressed: “The most important ways to reduce the risk of this type of cancer are not smoking and reducing alcohol consumption.”

Symptoms of esophageal cancer may include heartburn, indigestion, or pain in the throat or chest, along with weight loss.


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