Coffee

Caffeine was once thought to be a significant diuretic, but that’s actually not true. Unless it’s consumed in large quantities (more than 500 to 600 mg a day, or two coffees) there aren’t such negative effects. In fact, studies have shown that urine output isn’t significantly changed when a person drinks a caffeinated beverage, rather than something non-caffeinated like water. So, as long as you enjoy your coffee in moderation, there’s not much to worry about. Great News! 

Coffee contains lots of antioxidants (it's the biggest source of antioxidants in an average Western diet!) that help the body fight chemicals called “free radicals.” As a result, coffee drinkers are at a lower risk of diseases such as Parkinson’s Disease, Type II Diabetes, and Heart Disease.