Coffee is a healthy drink; or is it killing you slowly? We know it prevents heart disease and boosts your brainpower — or did they say it raises your blood pressure and ruins your concentration? What is clear: Coffee is something many of us drink, and while the science is still out on every health claim, no one should think twice about that daily habit. Of course — and you knew we were going to get to this — "moderation is key," says Marie Barone, registered dietician and certified diabetes educator with the division of health management and education at UC Davis Medical Center. Along with colleague and fellow RD Melinda Gong, Barone laid out the facts, and pointed us to the myths she encounters daily about coffee. Here's what you need to know.