Is it good to drink a lot of water in the morning?

Dec 09, 2025 Source: Cainiu Health

Dr. Cao Zhiqiang

Introduction

Drinking an appropriate amount of water replenishes fluids lost during the night, activates the body's metabolism, promotes intestinal motility, and helps eliminate metabolic waste, laying the foundation for daily physiological activities. In particular, consuming a small amount of warm water on an empty stomach is gentle and non-irritating to the body. However, drinking excessive amounts of water can dilute gastric juices, impair digestion and nutrient absorption at breakfast, and may increase the kidneys' filtration load. Consuming too much water in a short period could even lead to water intoxication.

Generally, drinking an appropriate amount of water in the morning is beneficial to health, but excessive intake may place a burden on the body. If any abnormalities occur, it is advisable to seek medical attention promptly. The detailed explanation is as follows:

Drinking a moderate amount of water can help replenish fluids lost during the night, activate metabolism, promote intestinal motility, assist in eliminating metabolic waste, and prepare the body for daily physiological activities. In particular, consuming a small amount of warm water on an empty stomach is gentle and non-irritating to the body.

However, drinking too much water can dilute gastric juices, impair digestion and absorption of breakfast, and potentially increase the kidneys' filtration load. Excessive intake within a short period may even lead to water intoxication, causing symptoms such as dizziness, fatigue, and nausea. These effects are more pronounced in individuals with weaker gastrointestinal function.

Water intake should be adjusted according to individual needs, typically around 200–300 milliliters. Warm water is recommended, while ice-cold or scalding hot water should be avoided. People with special health conditions may adjust their intake based on their body's response.

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