Do we really need two liters of water a day?

We constantly hear that we must drink at least 2 liters of water a day, or more. However, there is some controversy over whether we really need that amount of water daily.

Water is an essential element for life, that’s why many people, companies and advertising campaigns tell us to consume at least 2 liters daily. Is that amount really recommended?

Some people mention that there is not enough scientific evidence to support that, while others point out that the promoters of the “2 liters of water a day” created this claim to grow the business of bottled and mineral water.

How much pure water does our body need?

While liquids are the main source of water in our body, we can also obtain it from the foods we taste in our normal diet such as egg, watermelon, papaya, pineapple, melon or asparagus, which provides a large amount of water to our body.

In addition, coconut water also contains a significant amount of nutrients, which even helps to fight dehydration. A glass of coconut water can equal up to three glasses of simple water.

What does science tell us?

In 2004, the Institute of Medicine of the European Union established that the recommended amount of water consumption per day was 2.7 liters for women and 3.7 liters for men. But that refers to the total daily intake of the liquid, including all its sources.

On the other hand, the United States Dietary Guidelines do not recommend a specific daily intake, but people should adjust to their thirst and choose pure or flavored water over soda.

Drinking 2 liters per day may seem too much, since the recommendations we heard often don’t take into account that much of our fluid intakes comes from other foods and beverages, so keep that in mind the next time you fill your bottle.



1)Foods rich in water to combat dehydration. Tatiana Zanin, Nutritionist. Diet and Nutrition, Tua Saúde.

2) Water: Do we really need 8 glasses a day?, Judith Marcin, MD. Medical News Today, Estados Unidos. Julio, 2018.