Drinking very hot beverages has been linked to cancer risk, according to studies. Find out why extremely hot drinks may be harmful and what temperature is safe.
The Connection Between Hot Drinks and Cancer
The International Agency for Research on Cancer (IARC), part of the World Health Organization (WHO), has classified very hot drinks (above 65°C / 149°F) as “probably carcinogenic to humans”.
This conclusion is based on evidence suggesting that regularly consuming extremely hot drinks—such as tea, coffee, or maté—may increase the risk of esophageal cancer.
Why Are Hot Drinks Risky?
It’s not the drink itself (tea, coffee, or maté) that causes cancer, but rather the temperature:
Thermal injury: Very hot liquids can damage the lining of the esophagus.
Chronic irritation: Repeated burns may lead to inflammation and cell changes.
Higher cancer risk: Over time, this damage could contribute to the development of cancer.
What Temperature Is Safe?
Drinks below 60–65°C (140–149°F) are generally considered safe.
Letting your coffee or tea cool down for just a few minutes can reduce the risk.
Most people naturally drink beverages at 50–60°C (122–140°F), which is less concerning
Who Is Most at Risk?
People who frequently drink scalding hot tea, coffee, or maté.
Regions where hot beverages are a cultural norm (e.g., parts of South America, Asia, and the Middle East).
Smokers and heavy alcohol drinkers—since these factors also increase esophageal cancer risk.
The danger lies in the temperature, not in the drink. Enjoying tea, coffee, or herbal infusions at a moderate temperature is safe and even offers health benefits. But sipping scalding hot drinks daily could increase your cancer risk.