Oh my gosh, it should be taught in schools!
I've recently downloaded an app that includes a section to monitor hydration, I think I may have spent my entire life chronically dehydrated, I've never drunk this much water before and I feel AMAZING.
Normally I slump in the afternoon and crave wine in the evening but water fixes it.
Now I may be coming across as a bit, well, simple with all this excitement but dehydration actually explains a lot of the issues I've had over the past 40 years.
Go and drink some water people 

(okay, wrong emoji and wine messes with my target water consumption)