“If you're looking for the most hydrating option, decaf coffee is your best choice, since it lacks the diuretic effect of caffeine,” says Colón. For example, an 8 ounce (oz) cup of regular ...

This includes drinks like black coffee. One cup (8 fl oz) of black coffee contains less than 3 calories and very small amounts of protein, fat, and trace minerals. For most people, the nutrients ...