Checking cholesterol levels is an important aspect of health care as these can tell you a great deal about your health status. However, there are several types of cholesterol: high density-lipoprotein (HDL) or "good" cholesterol, low density-lipoprotein (LDL), which is often considered "bad" cholesterol, as well as a third type, triglycerides. Why are higher LDL levels considered unhealthy and dangerous? LDL contributes to the build-up of a waxy, fat-like substance in the arteries. In turn, this can lead to atherosclerosis (a hardening of the arteries), which can lead to coronary artery disease (CAD), heart attack, and stroke among other serious health problems. Many factors can cause LDL levels to climb. These include genetic factors (a family history of high LDL), being obese or overweight, lack of physical exercise, diet, and medications you're taking. It's important to understand these causes, as it can help you prevent and m...