what is the difference between ldl and hdl
LDL and HDL are very different lipoproteins. LDL is generally fatty acid rich with cholesterol ester (CE) core. Its density is low because it carried a lot of traiglycerides (TG) and so floats. It has a specific apolipoprotein marker which tells the body which lipoprotein it is.
LDL's are cleared by the liver. HDL is generally fatty acid poor and cholesterol ester rich. It contains a different apolipoprotein which helps the body tell it apart from LDL. Simply put, it transports cholesterol back to the liver from other areas of the body.