How much water do we need?
The amount of water that you should drink every day depends on your weight.
In general 2 litres a good recommendation.
But it is better to have the daily amount to match your weight.
We calculate the daily water intake (in litres) that a person is expected to drink by his divide weight by 28.
For example, if someone 70 kilos weighs, and we divide this weight by 28, then 2.5 litres are his daily water intake (70 kg : 28 = 2.5 litres).
If a person 105 kg weighs, his recommended water intake is 3.75 litres per day (120 kg : 28 = 3.75 litres).
When you lose weight, you can reduce the amount of water proportionally.
Source: 'The Power of Your Metabolismby Frank Suarez