The myth of the 8 glasses of water a day

Since we were young, we were told that we needed to drink around 8 glasses of water a day will keep us healthy and well dehydrated. Yet, the estimate in many cases seems to be way above our health requirement. There's no evidence that we need to drink more water than our dictates. Researchers in relationship to the matter mention that the requirements must vary between the temperature of the place, amount of physical activity and the size of the individuals. When trying to find the source of the eight glasses of water, I found a no exit alley. It seems to be just a myth that came from someone's word and has lasted to this day. It is hard to not lie with statistics, when sometimes, we dont even know what our source is.

-Xavi