Can a Glass of Water in the Morning Support Your Health? Here's What You Should Know...

For many people, the first thing they reach for after waking up is a cup of coffee. But health experts say there's another simple morning habit worth considering before your caffeine fix: drinking a glass of water.

After spending six to eight hours asleep without drinking anything, your body naturally wakes up slightly dehydrated. Replenishing those lost fluids first thing in the morning may help support several normal bodily functions.

While drinking water isn't a miracle cure, making it part of your morning routine can be a simple way to support your overall health.

1. It Helps Rehydrate Your Body

Your body loses water throughout the night through breathing and perspiration.

Starting the day with a glass of water helps replace those lost fluids and supports normal functions such as:

• Regulating body temperature
• Transporting nutrients
• Lubricating joints
• Supporting healthy circulation

Even mild dehydration can leave you feeling tired or sluggish.

2. It May Help You Feel More Alert

Many people mistake mild dehydration for fatigue.

Although water isn't a substitute for sleep, restoring hydration after waking may improve alertness and concentration, especially if you haven't had anything to drink for several hours.

If you often wake up feeling groggy, drinking a glass of water before reaching for coffee may help you feel refreshed.

3. It Supports Healthy Digestion

Water plays an important role in digestion.

Drinking water in the morning helps prepare your digestive system for the day and may support normal bowel movements by keeping stools soft and easier to pass.

Combined with a diet rich in fiber, adequate hydration is one of the simplest ways to help prevent constipation.

4. It May Help You Manage Your Appetite

Some research suggests that drinking water before meals may help some people feel fuller, which could reduce overall calorie intake.

While water alone won't cause weight loss, replacing sugary beverages with plain water is a healthy habit that may support long-term weight management.

5. It Supports Healthy Kidney Function

Your kidneys rely on adequate hydration to filter waste products from your blood and produce urine.

Drinking enough water throughout the day—including in the morning—helps maintain normal kidney function in healthy individuals.

However, people with certain kidney or heart conditions should follow their healthcare provider's advice regarding fluid intake.

6. It Helps Replace Sugary Morning Drinks

If your usual breakfast includes soda, sweet coffee drinks, or sugary juices, switching to water can significantly reduce your added sugar intake.

Making this small change consistently may benefit your overall health over time.

Does Warm Water Offer Extra Benefits?

Some people prefer warm or room-temperature water first thing in the morning.

Although there's little scientific evidence that warm water provides unique health benefits compared with cold water, many people find it easier to drink and gentler on the stomach.

The most important thing is simply staying hydrated.

Should You Add Lemon?

Adding a slice of lemon can enhance the flavor and provide a small amount of vitamin C.

However, claims that lemon water "detoxifies" the body or dramatically boosts metabolism are not supported by strong scientific evidence.

Your liver and kidneys already perform your body's natural detoxification processes.

How Much Water Should You Drink?

There's no single amount that's right for everyone.

A glass containing about 8 to 16 ounces (240–500 mL) is a reasonable way to start the day for most healthy adults.

Your hydration needs depend on factors such as:

• Age
• Body size
• Activity level
• Climate
• Overall health

The best guide is to drink enough fluids throughout the day so that your urine is pale yellow and you rarely feel thirsty.

The Bottom Line

Drinking a glass of water when you wake up is a simple habit that can help rehydrate your body after a night's sleep, support digestion, contribute to healthy kidney function, and promote overall hydration.

While it isn't a cure-all or a replacement for a balanced diet, regular exercise, and adequate sleep, it's an easy and inexpensive habit that many people can incorporate into their daily routine.

Sometimes, the healthiest changes are also the simplest—and starting your morning with a glass of water may be one of them.