You can't see high cholesterol. You can't feel it. It doesn't have any symptoms. Yet it kills 500,000 Americans each year. It's a major risk factor for coronary heart disease and stroke. The first step to controlling cholesterol is to understand whether you're at risk for problems. This quiz can help you figure that out. This test is based on the treatment goals of the National Cholesterol Education Program and should be used as a guideline only.