I recently went through an article in THE HINDU, Chennai edition. It says that one has to consume a minimum of 3 litres of water daily to keep one’s kidney healthy.
This is how it goes….
“Doctors say keeping cholesterol, blood pressure and sugar levels under control, drinking three litres of water daily ……………..help keep kidneys healthy.”
One should consume water according to one’s thirst if not under medical supervision for some ailment. Also do not consume lots of water at one go. It just increases the load on the kidneys as you urinate more. So drink little by little and slowly.
A person working in the fields would require more water that an IT guy sitting in the A/C.
Anything consumed in a semisolid form (soup or food mixed with rasam or curd) also keeps one hydrated. Rehydration need not necessarily be in the form of water.
That one (especially during travel) is not comfortable using a public restroom or cannot relieve oneself outdoors, should not be the reason why one is not consuming water. Not drinking water despite being thirsty is extremely bad for the kidneys.
Let us assume that God has created a machine( you) with 2 small bean shaped filters which will work for 100 years or filter 100,000 litres, whichever is first. Now it is in your hands whether you use these (there are no spare parts) for 100 years or finish off the 100,000 litres in 40 or 50 years. Ayurveda says that a premonitory symptom, excessive urination (prabhuta mutratvam) will lead to diabetes in later life. So in this case, by drinking excessive water why should one get the body tuned to excessive urination. I wouldn’t be surprised if in 20 years somebody would come up and say “drinking too much water for 10years might lead to diabetes in later life”.