When you are thirsty, the glands all over dry up; you get warm, dry mouth, and feel thirst.
Cold water can give you the illusion that you have “quenched” the thirst before you actually drink enough water. It does this in two ways:
- It cools you down quickly, and
- It makes your mouth wet.
Room-temperature water, however, will not immediately and quickly cool you off so you will be able to drink enough. This will allow you to drink more and stay hydrated more easily. Those who only drink ice water might be chronically dehydrated just because the water is too cold! Drink your water at room temperature for the best hydration.