It doesn't need to be pure water to get benefits out of it. There was a study published on whether diuretic drinks (coffee, caffeinated sodas) provided equal h

It doesn't need to be pure water to get benefits out of it. There was a study published on whether diuretic drinks (coffee, caffeinated sodas) provided equal hydration benefit. Pretty much, they do. Coke now uses it as part of their advertising campaign. http://www.dietcoke.com/wellness-balance/hydration.jsp http://www.dietcoke.com/wellness-balance/hydration.jsp