The number of cases of diabetes and prediabetes among Americans of all ages and ethnicities continues to increase, says a new report out from The Centers for Disease Control and Prevention (CDC).

More than 29 million Americans suffer from diabetes – an increase of about three-million from just three years ago. Even more worrisome is 1 in 4 don’t even know they have it.

The CDC says people with diabetes are at increased risk of serious health complications including blindness, heart disease, stroke, kidney failure, amputation of toes, feet or legs, and premature death. Prevention efforts nationwide are crucial to combat serious health risks.

Diabetes is a disease in which sugar builds up in the blood. The most common form is tied to obesity, and the number of diabetics has ballooned with the rise in obesity.

The good news is that if you’re diagnosed with diabetes or prediabetes, you don’t have to handle it alone. The Diabetes Education Program at Washington Adventist Hospital and Adventist HealthCare Shady Grove Medical Center provides comprehensive education and training by Certified Diabetes Educators to help people learn and manage all aspects of diabetes care and prevent complications. Learn more about the Diabetes Education Program and our free support groups here.

How much do you know about diabetes? Test your knowledge with our quick and easy quiz.

The CDC used a 2012 national survey and other data to come up with the new numbers.