Drinking beverages hotter than 65 degrees Celsius significantly increases the risk of developing oesophageal cancer, according to research evaluated by health authorities. Consuming scalding liquids causes chronic thermal injury to the delicate lining of the food pipe, a process that health experts link to malignant cell changes over time.
Thermal Injury and Oesophageal Cancer Risk
The International Agency for Research on Cancer (IARC), the cancer research arm of the World Health Organization, classifies very hot drinks above 65°C as probably carcinogenic to humans. According to findings discussed by the British Broadcasting Corporation (BBC) and health reporting by Raid Teilifís Éireann (RTE), consuming liquids at such high temperatures scalds the oesophageal mucosa. Repeated thermal damage leads to chronic inflammation, which accelerates cellular turnover and raises the probability of genetic mutations that form tumors.
Epidemiological studies cited by public health researchers indicate that populations with cultural practices of drinking extremely hot tea, mate, or coffee experience higher rates of squamous cell carcinoma of the oesophagus. Unlike chemical carcinogens found in tobacco or alcohol, thermal injury physically destroys cellular structures, prompting a continuous repair cycle that leaves tissue vulnerable to malignant transformation.
Clinical Guidance on Beverage Temperatures
Medical professionals advise allowing hot drinks to cool before consumption to mitigate thermal damage. According to clinical guidance highlighted in public health advisories, letting tea or coffee sit for a few minutes drops the temperature below the threshold associated with mucosal injury. Gastroenterologists emphasize that the human oesophagus lacks pain receptors capable of registering acute thermal damage in the same manner as the skin, meaning individuals can scald their food pipe without experiencing immediate, severe discomfort.
Frequently Asked Questions
At what temperature do hot drinks become dangerous?
According to World Health Organization assessments, beverages consumed at temperatures exceeding 65°C (149°F) pose an increased risk for oesophageal cancer due to chronic thermal injury.
Does adding milk change the risk?
Adding cold milk or water lowers the overall temperature of the beverage, effectively reducing the thermal hazard to the lining of the food pipe.
What are the symptoms of oesophageal damage?
Early thermal injury often presents no immediate symptoms, but chronic damage can eventually lead to persistent difficulty swallowing, painful swallowing, or unexplained weight loss, which require prompt medical evaluation.
Keep reading