SOCIETY

Cold or Room-Temperature Water? The Truth Most People Get Wrong

October 07, 2026, 00:15 28 views

Does Water Temperature Really Matter?

Some people like ice-cold water, while others believe lukewarm water with a slice of lemon is healthier. So does the temperature of your water actually matter? Verywell Health looked into the question.

According to Loren Manaker, a registered dietitian-nutritionist with a master's degree, research on the health effects of different water temperatures is actually quite limited. In her view, the ideal temperature depends on the person and the situation.

Cold water: pros and cons

One reason people prefer cold water is that it's more refreshing than warm or room-temperature water. "People tend to drink cool water more, especially after exercise or in hot weather," Manaker said.

Studies suggest cold water helps cool the body and gradually lowers the elevated body temperature that comes with exercise. One study published in Frontiers in Sport and Active Living found that people usually find cold water more appealing after a workout. This may lead them to drink more, replace fluids lost during exercise, and reduce the risk of dehydration.

Another study, published in Frontiers in Psychology, suggests that drinking cold water may also stimulate the vagus nerve, which activates the body's "rest and digest" response and helps the body relax.

The dietitian added that people may also favor cold water because it can temporarily regulate nervous system activity, lower heart rate, and ease stress or anxiety.

Cold water does have some drawbacks, though. "Cold water isn't always better, and very cold water doesn't automatically become the best choice for hydration. Ice-cold water can be uncomfortable for people with sensitive teeth, migraines, swallowing problems, reflux-related throat irritation, or certain esophageal conditions," Manaker said.

Room-temperature water: pros and cons

Some people prefer room-temperature water because it is easier to drink or because they believe it is healthier.

There is also a widespread belief that room-temperature or warm water is better for digestion, but experts say this is a myth. "There is no strong evidence that warm or room-temperature water is universally better for digestion. The digestive system of most healthy people handles the usual range of water temperatures perfectly well," Manaker said.

The Harvard T.H. Chan School of Public Health likewise does not support the claim that room-temperature water is better for gut health.

The dietitian also said there is no need to avoid cold water first thing in the morning: "Drinking cold water in the morning doesn't dangerously 'shock' the body. Some people may find it uncomfortable, but that doesn't mean it's harmful. For some people, especially those with a sensitive stomach or throat, warm or room-temperature water may simply feel more comfortable."

Hydration matters more than temperature

The expert stressed that there is no clear "winner" between room-temperature and cold water.

"There is no single ideal temperature that works for everyone. The best water temperature for maintaining daily hydration is usually the one you enjoy drinking regularly," she said.

In other words, what matters is not the exact temperature of the water but whether you take in enough fluids throughout the day.

How much water you need depends on several factors, including sex, age, health status, physical activity level, and individual needs. General recommendations call for about 15.5 cups of total fluid per day for men and 11.5 cups for women, but in reality there is no universal amount that suits everyone.

"If you want to pin down your fluid needs more precisely, talking to your doctor is a good first step. A doctor can assess your medical history and overall health goals and help tailor recommendations to you," the article says.