Experts told, how much it is necessary to drink water day

Every day, with sweat, urine and breathing, at least 2-3 liters of water are excreted from the body, which must be replenished during the day. And this is just to satisfy our minimal physiological needs.
How much to drink water per day? This question everyone asked himself at least once. Norm is a relative concept. Many medical and medical research works have spread around the phrase: “A person should drink 8 glasses of water a day.”
This statement is not a dozen years and it is a truncated version of the recommendations of the National Academy of Sciences of the United States, developed in 1945. This document sounded the notorious phrase. Only, as it turned out, it sounded a little different. 1 ml of water for each kilocalorie of food was recognized as necessary for a person.
The diet of a modern person on average is 2000–2500 kilocalories, which is actually equal to 8 cups of water, followed by a phrase that is usually safely forgotten: “Most of the required amount of water is contained in cooked food.” Thus, the notorious 8 glasses are not plus to the daily diet, as some advocates of too healthy lifestyle say, but enter it.
The amount of water consumed per day depends largely on its quality, but restrictions on consumption still exist. If an excess amount of water is supplied to the body — more than the kidneys, skin and lungs can remove — the concentration of vital electrolytes (potassium, sodium, chlorine, etc.) and plasma proteins will decrease.
Please note that yogis offer to drink 10-12 glasses of water a day. This exceeds the above-mentioned norm, especially since we are talking about drinking water, and not coming along with raw vegetables, berries and fruits. Why are the differences so great? Some people see the cause in climatic conditions: in India it is hot, so people are more dehydrated and should drink more; others dig deeper and try to trace the differences in the quality of drinking water.
Did you know that tea, coffee, carbonated drinks, beer and alcohol, so beloved by many, are diuretics. And, accordingly, although at first these drinks seem to quench their thirst, they contribute to the release of fluid from the body.
It is proved that when you drink coffee, tea or even beer, your body is freed from more water than is contained in the drink. On the other hand, if we talk about caffeine, then its moderate consumption, on the contrary, contributes to a better absorption of fluid, which cannot be said about mineral water. It is dead water that cannot be revived by any impact on it. The dangers of alcohol and beer are talked about a lot and often, but, apparently, our mentality does not accept the concept of non-alcoholic life. Therefore, let’s try to at least reduce the consumption of spirits.
So, you can determine how much to drink water per day at the rate of 40 ml per 1 kg of weight, that is, 2.5-2.8 l. On average, with food and drink, we consume 1.5-2 liters (considering the water in fruits and vegetables). Water released by internal processes is about 400 ml. It is easy to calculate that the total amount of water required for vital activity is 2-2.5 liters per day. Practice shows that large-sized people should drink 14 g of water for every 450 g of weight.
A person weighing 90 kg needs 2.8 liters of water. You need to drink water every time you feel thirsty, even while eating and be sure to have one glass of clean water on an empty stomach in the morning to make up for the loss of water in eight hours of sleep. However, this recommendation is not the ultimate truth. There are people who, by nature, tend to drink more water a day, others less. The former are usually more sensitive and thinking personalities, the latter are more active.