What Happens to Your Body When You Drink Ice-Cold Water Versus Warm Water?


Credit: Natalia Gdovskaia / Getty Images
Credit: Natalia Gdovskaia / Getty Images
  • Both warm and cold water hydrate equally well.
  • Cool water may be the best choice during exercise, in hot weather, or when dehydrated because it can help lower body temperature.
  • Warm water may temporarily soothe cold symptoms and help you feel more comfortable in cold weather.

Drinking water throughout the day is essential for overall health. Water is involved in nearly every biological process in your body, and dehydration can lead to headaches, fatigue, constipation, and more. But does the temperature of the water you drink make a difference?

Does Water Temperature Matter for Overall Health?

When it comes to hydration and overall health, the temperature of the water you drink doesn’t matter.

When you ingest food or fluids, it travels through your intestinal system and is warmed or cooled to body temperature. In most cases, cold and warm water hydrate you equally well, so you can choose the fluid temperature that you like best. 

Rather than focusing on the temperature of the water you drink, it’s more important to prioritize drinking enough water each day. Though water needs vary and depend on factors like body size, activity levels, and your environment, the Institute of Medicine (IOM) recommends that adult women take in 67-91 ounces ( 2–2.7 liters) of water per day and adult men take in between 84-125 ounces (2.5–3.7 liters) per day.

You can meet your water needs by drinking it or consuming water-rich foods like fruits and vegetables. 

When Should You Choose Specific Temperature Water?

While the temperature of your water doesn’t matter for hydration in most cases, choosing cold or warm water may make sense in certain situations. 

Cold Water Is Best During Heat Stress or Dehydration

Research suggests that cool or cold water can help lower your body temperature when you’re overheated, such as during exercise in hot weather. 

A 2025 study found that drinking cool water (about 61 degrees Fahrenheit) lowered core and skin body temperatures more effectively than warm water in people exercising in hot temperatures and helped the study participants feel more comfortable in the heat.

Another study found that dehydrated participants voluntarily drank more cool water (61 degrees Fahrenheit) than ice-cold, room-temperature, or hot water. The participants drank more cool water while maintaining relatively low sweat losses, so the researchers concluded that cool water may be the best choice for rehydration after heat stress.

Hot or Warm Water May Help When You’re Sick

When you’re sick with the common cold or flu, sipping warm or hot water could temporarily soothe symptoms like a sore throat and congestion. 

Some older research suggests that drinking a hot beverage may improve how open your nasal passages feel and provide temporary relief from symptoms such as a runny nose, cough, sneezing, sore throat, chills, and tiredness more effectively than the same drink served at room temperature.

Sipping on a mug of warm water or tea can also feel comforting when you’re under the weather, which may encourage you to stay hydrated and temporarily ease symptoms like headaches.

Hot or Warm Water Could Help you Warm Up

If you’re feeling cold, drinking warm or hot water may be a better choice than cold water.

Studies show that although warm drinks won’t significantly raise your body temperature, they may reduce shivering and improve comfort or physical performance in cold weather. This makes hot or warm water a better choice than cold if you’re out in the elements and want a comforting drink that may help you feel warmer and reduce shivering.

Can Drinking Cold Water Help With Weight Loss?

While drinking more water in general can help with weight loss, the temperature of your water doesn’t matter as much as some people think.

Though colder water (37 degrees Fahrenheit) has been shown to increase metabolic rate by about 4.5%, the effect is very small, short-term, and has little impact on overall calorie burning.

Since there’s no evidence that drinking cold water is more effective for weight loss than room temperature or warm water, you should choose whatever temperature helps you drink the most and stay optimally hydrated, which is key for energy balance

Studies show that people who are dehydrated tend to have higher BMIs and are more likely to be obese compared to people who are properly hydrated. Plus, drinking more water can help you eat fewer calories, creating the calorie deficit needed to lose excess body fat. 

Which Should You Choose?

While water temperature usually doesn’t matter for hydration or overall health, there are a few situations where one option may be the better choice:

  • Athletes or workers in the heat: Cool or cold water may improve thermal comfort and help with temperature regulation during exercise or physical labor.
  • People with swallowing disorders or esophageal conditions: Water temperature may affect comfort and ease of swallowing for people with some medical conditions, such as esophageal motility disorders.
  • People with tooth or headache sensitivity: Very cold water may cause discomfort in those with sensitive teeth and trigger headaches in some.

Under certain circumstances, cold water may be a better choice than warm water and vice versa. However, if you’re healthy and just looking to support overall health and hydration, personal preference matters most. Cold and warm water both hydrate you equally well, so the best choice is the one you’ll drink consistently.



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Medically reviewed by Robert Burakoff, MD

Drinking herbal tea and winding down with a relaxing activity can help soothe your gut at night.Credit: Drazen Zigic / Getty Images
Drinking herbal tea and winding down with a relaxing activity can help soothe your gut at night.
Credit: Drazen Zigic / Getty Images
  • Small habits in the evening can influence your gut health.
  • Eating a Mediterranean-style dinner, drinking a cup of herbal tea, and taking an after-dinner walk are simple ways to support your gut health in the evening.
  • Stress management, a regular bedtime routine, and getting seven to nine hours of sleep each night help anchor your circadian rhythm, which may keep your gut bacteria balanced.

Gut health is something you can work at improving at all hours of the day. Here are seven simple habits you can do in the evening hours to support gut health.

1. Have a Mediterranean Dinner

Following the basics of the Mediterranean diet at dinner could support your gut health in the evening and beyond. This includes:

  • Fresh fruits and vegetables
  • Legumes
  • Whole grains
  • Poultry
  • Fish
  • Healthy fats, like olive oil

The foods you eat determine the makeup of your gut microbiome, or the system of microorganisms that live in your gastrointestinal tract. Whole foods and minimally processed foods contain nutrients, such as fiber, vitamins, and minerals, that support a balanced gut.

The Mediterranean diet is known for its health benefits, including reduced inflammation and improved overall health. Research also shows that the diet has a positive impact on the gut. People who followed a Mediterranean diet were found to have more microorganisms in their gut compared to people who ate a diet higher in sugar, fat, and salt.

2. Finish Eating 2-3 Hours Before Bed

Eating too close to bedtime could disrupt your sleep and impact gut health. A meal that isn't fully digested can cause unpleasant digestive symptoms, especially if you're prone to indigestion. While there are no rules about when to stop eating before bed, finishing your last full meal two to three hours before bedtime can give your body enough time to digest.

New, early research suggests that eating late at night may negatively affect the gut. The researchers found connections between stress, late-night eating, and bowel issues. Those who had both high stress and late-night eating patterns were 2.5 times more likely to also report bowel problems and have lower gut microbiome diversity.

If you need a snack after dinner, opt for foods that have protein, fiber, or healthy fats, including:

  • Fruits, like berries or kiwi
  • Low-fat yogurt
  • Nuts
  • While grains
  • Fermented foods like kimchi, kefir, or kombucha

3. Take a Walk After Dinner

An evening stroll can have benefits beyond getting in your daily steps. It could also help your body move food through the digestive system.

You don't have to walk for that long, either. In one four-week study, researchers found that a 10-15-minute walk after a meal was more effective than a prokinetic medication for easing bloating and discomfort in adults who regularly experience bloating.

If you can't walk around the neighborhood, even standing up and moving your body around the room could help.

4. Have a Cup of Herbal Tea

Sipping a caffeine-free herbal tea in the evening can be a relaxing ritual. Certain teas, including ginger and peppermint tea, can also help with digestion and ease unpleasant symptoms such as gas and bloating.

Ginger is known for easing stomach discomfort. Drinking ginger tea can help with gas and bloating because ginger reduces constipation and the breakdown of undigested nutrients in the gut. You can buy dried ginger tea in a bag or make it from fresh ginger. It's generally considered safe to drink in moderate amounts daily.

Peppermint can help with cramping and bloating. The tea is made from peppermint leaves and is generally considered safe. One thing to note is that peppermint can also trigger indigestion, so if you're prone to heartburn, it might not be a good choice.

5. Pick a Wind-Down Practice

The brain and gut are connected. Stress affects gut health, and higher stress levels are linked to stomach issues such as nausea, constipation, and diarrhea. When your stress hormones are high, it can lead to increased gut inflammation and potentially an imbalance in gut bacteria.

Choosing a relaxing activity to practice in the evenings could help lower your stress, which can also benefit your gut. Try a mind-body or mental health practice, such as:

  • Meditation
  • Breathing exercises
  • Yoga
  • Journaling
  • Gratitude affirmations

Some evidence suggests that slow, deep breathing has positive impacts on the gut, such as improving symptoms in people with irritable bowel syndrome (IBS).

6. Keep Bedtime Consistent

Having a regular bedtime routine can help you get more consistent sleep, which may also positively affect your gut. Research suggests that changes to your sleep cycle can affect your gut microbiome. Keeping a regular sleep and wake time anchors the circadian rhythm. Even a few days of irregular sleep could impact your gut.

While researchers are still learning about the complex connection between the gut and sleep, it appears as though sleep disturbances can change the gut's makeup and function. Setting a regular bedtime and wake time and sticking to it as closely as possible could benefit your gut health.

7. Get Enough Sleep

Something as simple as regularly getting enough sleep could have a big impact on your gut health. Experts recommend that adults get between seven and nine hours of sleep each night. Sleeping less than seven hours could put you at risk for health issues.

Shorter sleep time can affect the gut microbiome, potentially causing an imbalance that could lead to inflammation and metabolic problems.

The relationship between sleep and your gut seems to work both ways. Just as poor sleep can negatively affect gut health, an unbalanced gut may contribute to sleep troubles. If you're not consistently getting the recommended amount of sleep and aren't able to improve your sleep with at-home habits, it might be worth asking a healthcare provider for help.



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