What Do Your Cholesterol Numbers Mean?

Everyone age 20 and older should have their cholesterol measured at least once every 5 years. It is best to have a blood test called a "lipoprotein profile" to find out your cholesterol numbers. This blood test is done after a 9- to 12-hour fast and gives information about your:

• Total cholesterol
• LDL (bad) cholesterol--the main source of cholesterol buildup and blockage in the arteries
• HDL (good) cholesterol--helps keep cholesterol from building up in the arteries
• Triglycerides--another form of fat in your blood

Wikipedi For Cholesterol

Cholesterol

Cholesterol is a waxy steroid of fat that is produced in the liver or intestines. It is used to produce hormones and cell membranes and is transported in the blood plasma of all mammals.^[2] It is an essential structural component of mammalian cell membranes and is required to establish proper membrane permeability and fluidity. In addition, cholesterol is an important component for the manufacture of bile acids, steroid hormones, and vitamin D. Cholesterol is the principal sterol synthesized by animals; however, small quantities can be synthesized in other eukaryotes such as plants and fungi. It is almost completely absent among prokaryotes including bacteria.^[3] Although cholesterol is important and necessary for mammals, high levels of cholesterol in the blood have been linked to damage to arteries and are potentially linked to diseases such as those associated with the cardiovascular system (heart disease).^[4]

The name cholesterol originates from the Greek chole- (bile) and stereos (solid), and the chemical suffix -ol for an alcohol. François Poulletier de la Salle first identified cholesterol in solid form in gallstones, in 1769. However, it was only in 1815 that chemist Eugène Chevreul named the compound "cholesterine".^[5]

What Is High Cholesterol?

What Is High Cholesterol?,High Cholesterol

What is high cholesterol?

Cholesterol is a type of fat (lipid) in your blood. Your cells need cholesterol, and your body makes all it needs. But you also get cholesterol from the food you eat.

If you have too much cholesterol, it starts to build up in your arteries . (Arteries are the blood vessels that carry blood away from the heart.) This is called hardening of the arteries, or atherosclerosis . It is usually a slow process that gets worse as you get older.

To understand what happens, think about how a clog forms in the pipe under a kitchen sink. Like the buildup of grease in the pipe, the buildup of cholesterol narrows your arteries and makes it harder for blood to flow through them. It reduces the amount of blood that gets to your body tissues, including your heart. This can lead to serious problems, includingheart attack and stroke.