Not so. Diabetes refers to a group of diseases -- all of which require serious attention -- that have in common the body's inability to properly convert glucose from food into energy, leading to a high level of sugar in the blood. The main kinds include type 1 (formerly known as juvenile-onset diabetes), type 2 (once called adult-onset diabetes), and gestational (which occurs only during pregnancy). The suspected causes differ for each type, but managing any type of diabetes requires balancing food, physical activity, and, if needed, medications. And while people with type 1 diabetes need to take insulin every day for their entire lives, type 2 diabetes is no less of a concern, because ignoring it could lead to devastating complications such as blindness, heart attack, and stroke.