hydration

This scientific research gives a clear-cut answer.
Presented by Brita
Don't fall for these hydration myths.
Beyoncé could partner up with a plywood company and woodworking would suddenly be the newest health craze. But that said, you may have just found your favorite new juice thanks to Bey.
While we know that not having enough to drink in extreme heat, or when vigorously exercising makes people very unhappy (and quite ill), it's less clear how small changes in fluid intake affect mood and energy levels.
In hot weather your body is prone to dehydration, and this actually can have an effect on your metabolism.