Usually, the body itself will prompt ... thirst. It doesn't matter if you have a "dry" because you have drunk a certain amount of beer and the like. They say that excessive consumption of coffee drains the body the most, followed by alcohol. But it all depends on the state of the liver, pancreas. And of course, the kidneys, which tend to excrete all this various fluid. And all these myths about the obligatory two liters of water a day are not worth a damn. I emphasize once again: a wise organism will tell you how much water it needs in its pure form. "I want to drink" - he will tell you)))
In 1.5 liters of beer, 75 ml of alcohol. The body needs 6 water molecules to withdraw one alcohol molecule. If we consider it very roughly, half a liter of water from this amount of beer will be spent on the removal of alcohol. 1500-75-500 = 925 ml of liquid remains. What is the proportion of water in these 925 ml and how high-quality water is it is difficult to say, depends on the good faith of the manufacturer. Let's say there remains 850-900 ml of "specially prepared, pasteurized" water. Such water is suitable for compensating for natural and caused by the withdrawal of alcohol dehydration, but it cannot be called useful for sure. As a result, you will need to drink at least another 1.2-1.5 liters of water to actually get those 2 liters a day.