Health and water

I saw discussions related to water, regarding purity, even type, whether it came from the well, tap, bottled, or alkaline, and so on. Water is essential to life, we all know that. But how much of an impact does the water you drink have on your health? In an article I stumbled upon while wandering around, they linked water quality to mental health and a better overall disposition. I honestly find that a bit too farfetched, but maybe I'm wrong. What's your opinion on this?

 

I've watched a video explaining how most of the illnesses are from lack of water that we could be doing years back.

 

Absolutely, lack of water can lead to dehydration. A condition that occurs when you don't have enough water in your body to carry out normal functions. Even mild dehydration can drain your energy and make you tired.