For millions of people, coffee is part of the daily routine. It starts the morning, fills the gap between meetings and often provides a small moment of comfort during a busy day. Most coffee drinkers think about caffeine, sugar or how many cups they consume. Far fewer stop to consider the temperature of the drink itself.
That may be worth changing.
Growing research suggests that drinking very hot beverages may be associated with an increased risk of esophageal cancer. The concern is not necessarily coffee itself. Instead, researchers are paying closer attention to the effect that repeated exposure to extreme heat may have on the lining of the esophagus.
A large study published in the International Journal of Cancer in September 2026 added new evidence to the discussion around hot coffee and esophageal cancer. The findings suggest that people who regularly consume very hot drinks may have a higher risk of developing esophageal squamous cell carcinoma.
The answer is more complicated than a simple yes or no.
Researchers do not currently say that coffee itself causes esophageal cancer. The concern appears to be related to the temperature of the beverage rather than the ingredients in coffee.
The 2026 study analyzed health information from nearly one million adults in the United Kingdom. Researchers looked at how often participants drank tea and coffee and whether they preferred their beverages warm, hot or very hot. Participants were then followed for more than a decade.
During that period, 2,348 participants developed esophageal cancer. Researchers found a particularly strong association between very hot drinks and esophageal squamous cell carcinoma.
People who preferred very hot beverages had around three times the risk of developing this type of esophageal cancer compared with people who preferred warm beverages after researchers adjusted for how frequently the drinks were consumed.
This does not mean that everyone who drinks very hot coffee will develop cancer. It does suggest that temperature may be an important factor in long term esophageal health.
The researchers also found that people who consumed six or more hot beverages per day had a higher risk of esophageal squamous cell carcinoma compared with those who drank fewer hot beverages.
This finding suggests that both temperature and frequency may matter.
Someone who occasionally takes a sip of overly hot coffee is not experiencing the same exposure as a person who drinks several very hot beverages every day for decades. The concern is repeated thermal irritation over time.
Still, it is important to understand the limits of the research. This was an observational study. Observational research can identify strong associations but it cannot prove that very hot beverages directly caused every case of cancer.
Cancer is complex and usually develops through a combination of genetic, environmental and lifestyle factors.
The esophagus is the muscular tube that carries food and liquids from the mouth to the stomach. Its inner lining comes into direct contact with everything we swallow.
When a beverage is extremely hot, it may cause thermal injury to this delicate tissue.
The body can usually repair minor injuries. However, repeated damage followed by repeated healing may create conditions where abnormal cellular changes become more likely over time.
Researchers believe this may help explain the association between very hot drinks and esophageal squamous cell carcinoma.
Think about taking a sip of coffee that is so hot that you immediately pull the cup away. Your mouth recognizes the heat instantly. The lining of the esophagus is exposed to the same temperature as the drink travels downward.
One very hot sip is unlikely to be the problem.
The concern is what happens when that exposure is repeated several times a day for many years.
The International Agency for Research on Cancer has previously classified drinking very hot beverages as probably carcinogenic to humans.
The agency has used temperatures above approximately 65 degrees Celsius as a reference for very hot beverages.
However, this does not mean that 64 degrees Celsius is completely safe while 66 degrees Celsius is automatically dangerous. Cancer risk does not usually work through such precise cutoffs.
The 65 degree level is better understood as a practical reference point.
There is also an important challenge in studying beverage temperature. Most people do not measure the temperature of their coffee before drinking it. In the recent study, participants described their beverages as warm, hot or very hot.
What feels hot to one person may feel normal to another.
For everyday coffee drinkers, a simpler approach may be more practical. If coffee or tea feels painfully hot, burns the mouth or causes discomfort while swallowing, letting it cool before drinking is a sensible choice.
One of the most important points for consumers is that the research does not suggest that coffee itself is the main cancer risk.
Coffee has been studied extensively for decades. The concern in this area of research is primarily the temperature at which beverages are consumed.
That means the same issue could potentially apply to tea, coffee, mate and other drinks if they are consumed at very high temperatures.
This distinction is important because headlines about coffee and cancer can easily create unnecessary fear.
The more accurate message is that repeated exposure to very hot liquids may irritate or damage the esophageal lining over time.
Hot beverages are only one possible factor in esophageal cancer risk.
Smoking is a major risk factor for esophageal squamous cell carcinoma. Heavy alcohol consumption is another. People who both smoke and drink heavily may face an even greater risk.
Esophageal adenocarcinoma has a different risk profile. Chronic gastroesophageal reflux disease and Barrett esophagus are strongly associated with this form of cancer.
Obesity, age, diet and other health factors may also influence risk.
This is why no single habit should be viewed in isolation. Drinking very hot coffee does not mean someone will develop esophageal cancer and avoiding hot drinks does not eliminate all risk.
For most people, there is no reason to stop drinking coffee simply because of this research.
The easier change may be to adjust how hot the coffee is when you drink it.
Allowing a fresh cup to cool for a few minutes may reduce unnecessary heat exposure. Drinking slowly may also help. If a beverage feels scalding, waiting before taking another sip is reasonable.
This is a small behavioral change and it does not require giving up coffee or tea.
Sometimes prevention is not about eliminating something you enjoy. It is about changing how you consume it.
Understanding the symptoms of esophageal cancer is also important.
Persistent difficulty swallowing is one of the most common warning signs. Some people describe a feeling that food is sticking in the chest or throat.
Other possible symptoms include unexplained weight loss, chest discomfort, persistent indigestion, worsening heartburn, hoarseness and vomiting.
These symptoms can occur with many conditions that are not cancer. However, persistent or worsening symptoms should be discussed with a healthcare professional.
Early evaluation matters because esophageal cancer can be difficult to detect in its earliest stages.
The connection between hot coffee and esophageal cancer is not as simple as saying that coffee causes cancer.
The growing evidence points toward something more specific.
Regularly drinking beverages at very high temperatures may repeatedly expose the esophagus to thermal injury. Over many years, that repeated irritation may contribute to a higher risk of esophageal squamous cell carcinoma.
Coffee itself is not the main concern. Temperature appears to matter more.
For coffee and tea drinkers, the takeaway is reassuringly practical. There is no need to panic and there is no need to abandon a favorite morning drink.
Simply allowing a very hot beverage to cool before drinking it may be one of the easiest ways to reduce unnecessary exposure.
The next time your coffee arrives steaming, giving it a few extra minutes may be worth it.
The coffee will still be there.
And your esophagus may appreciate the wait.
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