By: Sierra Dembski

What is LDL and HDL?

They are both considered to be lipoproteins, they are composed of fats and proteins. LDL is a low-density lipoprotein, they are catorgorized as "bad cholesterol", meaning that it can build it can build up into a hard plaque in your arteries (atherosclerosis) which can lead to a heart attack or stroke. HDL is high-density, and is considered to be "good cholesterol", meaning that it helps get rid of the LDL cholesterol from your arteries.

How do LDL and HDL differ structurally and functionally?

50% of the weight of an LDL is cholesterol and only 25% is protein, while HDL 20% of it is protein, and 50% is cholesterol. LDL have B-100 proteins, while HDL have A-I and A-II proteins. LDL are the carriers of cholesterol. They bring the cholesterol to the cells to your body, and they can cause build up in your arteries. HDL carries cholesterol away from the heart and all other organs, but bring it back to the liver so it can be broken down.

How are HDL and LDL associated with the risk for heart disease and other problems?

Low levels of HDL can been shown to a higher risk of heart disease. High levels of LDL can cause blood to clot in your arteries, and it will increase your risk of having a stroke or a heart attack.

What else is monitored in the patient's blood?

Triglycerides can also be found. They are a type of fat the body uses to store energy and give energy to muscles only small amounts should be found in blood. High levels may increase the risk of heart disease.

What do the results of a cholesterol test mean?

It can show your levels of HDL and LDL, to show you if you have a healthy level. And if you don't a doctor can tell you what to do, so you do not have a high risk of heart disease.