Drinking hot water every morning is trending, but does it really help? Learn what happens in your body and what the science actually says.
Key Points
- Drinking hot water in the morning is trendy right now, but the hydration is what’s key.
- Warm water helps rehydrate you and also may help digestion and bowel movements.
- The ritual of drinking a cup of warm water may help relax you in the morning.
While scrolling through social media, you’ve probably seen several creators swear by starting the day with a steaming cup of hot water, promising everything from better digestion to glowing skin. Although this trend may feel new, the practice itself is far from it. Drinking warm or hot water in the morning has deep roots in traditional and holistic health practices, where it’s often used as a gentle way to “wake up” the body.
According to Kaitlyn Ashner, RDN“Starting your day with fluids is a genuinely good idea—most of us wake up a little dehydrated after a full night without drinking anything.” Ashner also adds, “But the temperature isn’t really where the magic is.” In this article, we’ll break down what really happens in your body when you drink hot water every morning, and what’s fact versus fiction.
1. It Helps Rehydrate Your Body After Sleep
One of the most immediate effects of drinking hot water in the morning is hydration. “From a physiology standpoint, the primary benefit isn’t the temperature—it’s the hydration,” agrees Danielle Smiley, M.S., RDN, LDN, CDN. “After a night of sleep, the body is naturally in a mild state of dehydration, so drinking water in the morning helps restore fluid balance, support circulation and kick-start normal bodily functions,” adds Smiley.
Dehydration occurs during sleep because your body continues to lose fluids overnight through breathing, sweating and urine production. By the time you wake up, you’ve gone several hours without replenishing those losses, which can lead to subtle yet noticeable effects like fatigue, brain fog and sluggish digestion. Research shows that even mild dehydration can impact energy levels, cognitive performance and mood, while rehydrating in the morning helps to improve alertness, reaction time and overall mental clarity.
2. It May Gently Stimulate Digestion
Have you ever noticed the urge to use the bathroom shortly after drinking something in the morning? “The ‘warm water helps me poop’ claim has something real behind it,” says Ashner. “Drinking anything first thing in the morning triggers the gastrocolic reflex.” The gastrocolic effect is a natural process where your digestive system “wakes up” when food or fluids enter your stomach.
Warm liquids can make this response feel more noticeable, because they tend to be soothing and easier to drink first thing in the morning. But as Grace D. Garrett, M.S., RDN, LDNexplains, the temperature itself isn’t the main driver. “There are a few plausible, mildly supported effects—like stimulating a bowel movement via the gastrocolic reflex and slightly promoting gastric motility—but the biggest driver is overall hydration,” says Garrett. “Adequate fluid intake helps maintain stool consistency and supports regularity.”
In other words, while that morning cup of hot water may feel like it’s doing something special, it’s really the combination of hydration and your body’s natural reflexes working together to get things moving in the right direction.
3. It May Help Reduce Stress & Promote Relaxation
Starting your day with a warm or hot beverage, like a cup of hot water, may help to promote a sense of calm and relaxation. Smiley adds, “Warm liquids can feel more soothing and easier to drink first thing in the morning.” Research shows that exposure to warmth has been associated with a decrease in sympathetic activity in humans, which is when the body is in a state of “fight or flight.” Whether from warm beverages or baths, this can lead to a reduction in heart rate, decreased muscle tension and an overall calming effect.
Additionally, incorporating a simple morning ritual, like sitting down with a warm drink, has been linked to improved mindfulness and reduced perceived stress. Even small, consistent routines can help to regulate mood and provide a sense of control, which is very helpful during busy or overwhelming periods.
4. It May Help Improve Esophageal Motility
Drinking hot water may help support esophageal motility, which refers to how effectively food and liquids move from the mouth to the stomach. This can be particularly beneficial for individuals who experience esophageal spasms or conditions that affect swallowing.
Research has shown that warm liquids can help relax the esophagus and improve the movement of food, while very cold liquids may temporarily worsen symptoms in some individuals with motility disorders. A study found that drinking warm water significantly reduced esophageal food retention and improved esophageal function in individuals with achalasia, which is a condition that affects swallowing. When warm fluid passes through the esophagus, the heat can help reduce tone in the smooth muscle of the esophageal wall and the lower esophageal sphincter (LES), also known as the valve that controls the passage of food into the stomach. This relaxation makes it easier for the LES to open appropriately during swallowing.
Our Expert Take
Drinking hot water every morning can absolutely be a healthy habit, but not for the reasons you might see trending online. The real benefits come mostly from hydration, not the temperature. Starting your day with water helps to replenish fluids, support circulation and ease your body into the day after an overnight fast. It can also help support digestion and regularity by activating natural processes like the gastrocolic reflex, while consistent fluid intake helps maintain overall gut health. For some individuals, warm water may feel more comfortable to drink and may support smoother swallowing, while also creating a calming, intentional start to the day. Ultimately, the “best” water to drink is the one you’ll drink consistently. If warm water helps you build that habit, that’s where the real benefit lies.
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