Drinking Water???

[h2o]

How much water should we drink every day! And why is it so important?

I drink 2 litres a day, and a friend of mine told me that it was too much, that you should only drink when thirsty!! I said that if you feel thirsty, you are already dehydrated - have I got it wrong??

I think you are right but I'm not totally sure

they say 2 litres, but that includes water in your food, salads etc. 5 glasses a day is about right. I soemtimes dont drink anything at all till the afternoon, but im a sort of camel.

Isn't thirst your bodies way of telling you that you are actually dehydrated??