Extreme obesity plagues more than a million teens and young adults, experts estimate. What's a parent to do?

Until recently, type 2 diabetes was also known as adult-onset diabetes. Now, the adult-onset prefix has been dropped because so many children are developing the condition.

A Swedish study, over 29 years, finds 33 percent more cases of cancer among obese people than in the general population.

High blood cholesterol is one of the major risk factors for heart attack, the leading cause of death in America.

Diabetes occurs when there are high levels of glucose (sugar) in the blood. All three types of diabetes involve problems with insulin, a hormone that removes glucose from the blood and allows it to enter the body's cells. (The cells use it for energy.) If your body is unable to make or use insulin properly, you have a high blood glucose level.

Your risk of heart disease increases if you're more than 30 percent overweight. Obesity raises cholesterol, blood pressure, and can lead to diabetes, another risk factor for heart disease. You can reduce your risk for heart disease by losing as few as 10 pounds if you are overweight.

High blood pressure, or hypertension, is the most common chronic adult illness in the United States. There is no cure for high blood pressure, but it can be controlled.

The American Diabetes Association estimates at least 20.1 million people in the United States have pre-diabetes. Pre-diabetes means having a blood sugar level that is higher than normal, but not yet persistently high enough to be considered type 2 diabetes. By taking steps to control your blood sugar, you can delay or prevent type 2 diabetes from developing.

Take this quiz to find out how to cut your risk of developing diabetes.