There are two types of cholesterol: good cholesterol and bad cholesterol. Good cholesterol is also known as HDL cholesterol, or high-density lipoprotein cholesterol. Bad cholesterol is also known as LDL cholesterol, or low-density lipoprotein cholesterol. If we have too much or too little of either good or bad cholesterol, it can put us as risk for serious conditions such as coronary heart disease, heart attack or stroke. Therefore, you should be aware of your HDL and LDL cholesterol levels and discuss with your doctor how to properly manage them.