Is Drinking Cold Water Bad for Your Heart?
by Dr. Jonathan Doyle - Updated February 07, 2025
Many people enjoy a refreshing glass of cold water, especially on a hot day or after a workout. But have you ever heard the claim that drinking cold water is bad for your heart? Some believe it can trigger heart attacks, slow down digestion, or even cause serious health issues. But is there any truth to these concerns?
In this blog, we’ll explore the science behind drinking cold water, whether it has any negative effects on heart health, and what experts say about the matter. If you live in the UK and want to know whether to stick to room-temperature drinks or continue enjoying a chilled glass, read on!
Where Did the Concern About Cold Water and the Heart Come From?
The idea that drinking cold water can harm the heart comes from a mix of myths, cultural beliefs, and some misinterpretations of medical cases. Some common concerns include:
- Cold water can constrict blood vessels, leading to heart strain.
- Cold water can trigger a heart attack, particularly in those with pre-existing heart conditions.
- Cold water can affect digestion,putting stress on the body and, by extension, the heart.

But are these claims backed by science? Let’s take a closer look.
Can Drinking Cold Water Cause a Heart Attack?
It’s true that when you consume something cold, your blood vessels constrict slightly. This is part of your body’s natural response to temperature changes. However, for a healthy person, this mild constriction is temporary and not a cause for concern.
For people with underlying heart conditions, such as coronary artery disease , severe vessel constriction could theoretically contribute to discomfort or chest pain (angina). However, there isno scientific evidenceproving that drinking cold water directly causes heart attacks.

Can Cold Water Affect Digestion and Indirectly Impact the Heart?
Some people believe that drinking cold water canslow digestionby causing food and liquids to solidify in the stomach. In reality, your body works hard to maintain an internal temperature of around37°C, so any water you drink quickly warms up to match your body’s heat.
However, if you suffer from conditions like achalasia (a rare disorder affecting the oesophagus), extremely cold drinks could cause discomfort in swallowing. While this has nothing to do with heart health, it might explain why some people feel uneasy after drinking cold water.
Does Cold Water Have Any Benefits for Heart Health?
Despite the myths, drinking cold water hasseveral health benefits, even for your heart:

Helps Prevent Dehydration
Staying hydrated is essential for maintaining healthy blood circulation and keeping your heart functioning properly. Some people find cold watermore refreshing and easier to drink, which can help them stay hydrated throughout the day.
May Help Lower Body Temperature
If you’re overheating—whether due to exercise or a hot summer’s day—cold water can help cool you downfaster than room-temperature water.By lowering your core temperature, you reduce strain on your cardiovascular system.
Can Improve Exercise Performance
For those who enjoy staying active, cold water can be beneficial during and after workouts. Studies have found that drinkingcold water during exercisecan reduce fatigue and improve endurance, meaning your heart doesn’t have to work as hard.

Who Should Be Cautious About Drinking Cold Water?
Although cold water is generally safe, some people may need to be mindful:
- People with Raynaud’s disease : This condition causes extreme sensitivity to cold, and drinking cold water might trigger uncomfortable symptoms.
- Those prone to migraines : Some individuals find that very cold drinks can trigger headaches.
- Individuals with severe heart disease – If you have a heart condition, it’s always best to check with your doctor if you experience discomfort when drinking cold beverages.
Should You Avoid Cold Water?
For the vast majority of people, drinking cold water iscompletely safeand even beneficial. While extreme cold exposure can impact the body in certain ways, the idea that drinking a glass of cold water is harmful to your heart is amyth with little scientific backing.
However, if you personally feel discomfort after drinking cold water, there’s no harm in sticking to room-temperature drinks. Ultimately, it comes down topersonal preferencerather than a medical necessity.

Final Verdict: Cold Water and Heart Health
So, is drinking cold water bad for your heart? The simple answer isno. While cold exposure can influence blood vessels and digestion, there’s no solid evidence that drinking cold water causes heart problems in healthy individuals.
That said, if you have a heart condition or experience discomfort, it’s always wise to listen to your body and speak to a healthcare professional. Otherwise, feel free to enjoy your chilled glass of water without worry!
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