Is Drinking Water First Thing in the Morning Beneficial? Here’s What Science Says
You’ve probably heard the wellness advice: “Drink a glass of water first thing in the morning!” But is this just another health fad, or is there real science behind it?
Let’s break down the facts.
Why Your Body Might Need It in the Morning
After 6–8 hours of sleep, your body wakes up dehydrated. You haven’t had any fluids all night, and even mild dehydration can lead to:
- Fatigue
- Headaches
- Difficulty concentrating
- Sluggish metabolism
A glass of water in the morning can help restore hydration and jumpstart your system.
Potential Benefits of Drinking Water First Thing
- Rehydrates Your Body
Overnight, your body loses water through breathing and perspiration. Morning hydration helps replenish fluids and prepares your organs for the day. - Boosts Metabolism
Some small studies have suggested that drinking water can temporarily increase your resting metabolism — by up to 30% for about 30–40 minutes. While this alone won’t cause major weight loss, it may support metabolic health. - Flushes Out Toxins
Your kidneys work overnight to filter toxins. Water in the morning helps flush them out more effectively through urine, supporting detoxification naturally. - Promotes Healthy Digestion
Drinking water on an empty stomach may help “wake up” your digestive system, preparing it for breakfast and possibly preventing constipation. - Improves Brain Function and Mood
Even slight dehydration can affect your cognitive performance. Water first thing may help you feel more alert and clear-headed.
Should You Add Lemon or Stay With Plain Water?
Adding lemon can offer a small vitamin C boost and may aid digestion for some, but it’s not essential. What matters most is that you’re drinking water, not what’s in it.

How Much Water Should You Drink in the Morning?
A good target is 250–500 mL (about 1–2 cups). No need to overdo it — just enough to gently rehydrate and kickstart your body.
Any Downsides?
For most healthy people, there are no risks to drinking water in the morning. However, if you have certain medical conditions (like kidney disease or heart problems), consult your doctor about your fluid intake.
Bottom Line
Yes, drinking water first thing in the morning is beneficial — not because it’s magical, but because it supports natural biological processes like hydration, digestion, and mental clarity.
It’s a simple, low-effort habit that sets a healthy tone for the rest of your day.
Pro tip: Keep a glass or bottle by your bed to make it even easier. Your body will thank you.
Small habit, big difference — one sip at a time. 💧