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Low-density lipoprotein (LDL) cholestrerol aka "bad" cholesterol transports cholestrerol from the liver to various tissues, including blood vessels.
High-density lipoprotein (HDL) cholesterol aka "good" one because high levels will protect against heart attack.
The only way to check your cholestrerol level is to get your doctor to test sample of your blood for a lipid profile test after you have fasted for 9~12 hours.