Drinking cold water may seem like a harmless habit, especially after a large meal or on a hot day. However, various studies and observations indicate that doing so immediately after eating could have effects that go beyond the simple feeling of freshness. Below, we explain what really happens in your body when you drink cold water right after eating and how to do it in a healthier way.

The effect of cold water on digestion

When you finish eating, your body begins a complex process to digest and assimilate food. The stomach begins to work at a warm internal temperature, ideal for breaking down fats and nutrients.

However, when drinking cold water immediately after eating, there is a sudden change in temperature that can:

  • Temporarily reduce stomach temperature, slowing down digestion.
  • Solidify fats in fatty foods, making it difficult for them to break down.
  • Cause a feeling of heaviness or bloating, especially in people with slow digestion.

This does not mean that cold water is harmful in itself, but that the timing of its consumption can influence the digestive process.

Possible consequences of drinking cold water after meals

  1. Slower digestion:
    The body needs to restore the proper internal temperature, so it may take longer to digest food.
  2. Upset stomach or gas:
    Some people may experience mild abdominal pain, belching, or a feeling of fullness from the sudden cooling of the digestive system.
  3. Reduced absorption of nutrients:
    In cases of slow or weakened digestion, the body may absorb certain minerals and vitamins less effectively.
  4. Postprandial fatigue (tiredness after eating):
    Heavier digestion can lead to drowsiness or a slight feeling of exhaustion.

When and how it is best to drink water

Water is still essential for the body, but the key is to know when and at what temperature to consume it.

  • Before eating: drinking a glass of room temperature or warm water 20–30 minutes before helps prepare the digestive system.
  • During the meal: If you feel thirsty, take small sips of warm or plain water.
  • After eating: wait about 30 to 40 minutes before drinking cold water; This allows digestion to have advanced and the body to better tolerate the change in temperature.

Benefits of Room Temperature or Warm Water

Drinking warm or plain water after meals helps: