In 1945, the American Nutrition Commission published a recommendation that an average adult should drink 2.5 liters of water per day. True, the article went on to clarify that most of this amount is contained in food.

Also, the best-selling book by nutritionist Margaret McWilliams recommended drinking six to eight glasses of water per day. However, the author did include not only water, but also fruits, vegetables, and other beverages in this amount. But, in the masses entrenched information about only eight glasses.

But the WHO has no specific recommendations about the drinking regime. It all depends on body weight, level of physical activity, health and the conditions in which a person is. Thus, the need for an amount of water increases at high altitude, in a hot climate, with serious physical activity, breastfeeding, etc.

But "2.5 liters" is easier than "everything is individual".

💧💧💧💧How much water do we really need?💧💧💧💧

There are several formulas for calculating your daily water allowance. One of the most popular is multiplying 30-45 ml of water per 1 kg of body weight. An important clarification: this is how you calculate the amount of liquid you need. It is not always water. It also includes soups, milk, juices, fruit, and the like. Water is always emphasized because it is available and does not contain calories and impurities.

Age and gender play no role in the calculation. It is important to take into account the climate, the environment, and the amount of physical activity. Even in winter, if you wear a jacket that's too warm, you'll need an extra glass of water.