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www.reference.com/article/cholesterol-e1faa97b90a8849c

Cholesterol is a waxy substance found in the body's cells; it is similar to fat. The body makes cholesterol, but it also appears in some foods. High levels of cholesterol in the blood create an increased risk of heart disease, since cholesterol is a component of the plaque that can build up inside a

www.reference.com/article/good-cholesterol-4387444bac547661

High-density lipoproteins, often called "good" cholesterol, carry excess cholesterol from the blood to the liver, according to Mayo Clinic. In contrast, low-density lipoproteins are considered "bad" cholesterol because they contribute to the formation of plaque. The American Heart Association define

www.reference.com/article/symptoms-high-cholesterol-1befa76793d0169d

There are no symptoms of high cholesterol; the only way to discover that blood cholesterol levels are out of range is via a blood test. Mayo Clinic recommends that everyone have a baseline cholesterol test at age 20 and then every 5 years or sooner after that to keep a check on cholesterol levels.

www.reference.com/article/causes-cholesterol-ec29b4bb3c9bbbe

Cholesterol is both produced by the body and taken in with food. A sterol (modified steroid) and a lipid, cholesterol is essential for maintaining healthy cell membranes in animals and synthesizing bile acids and vitamin D. Usually the body, especially the liver, produces all the cholesterol the bod

www.reference.com/article/signs-high-cholesterol-1885e1c1ac4363aa

High cholesterol produces no symptoms, so the only way to find out if it is high is to have a lipid panel test, according to WebMD. This type of blood test provides information on all the fats in the bloodstream, including total cholesterol and HDL and LDL cholesterol.

www.reference.com/article/causes-high-cholesterol-ccc4c9f43b501539

Causes of high cholesterol include a poor diet, being overweight, low activity level, being older, certain diseases and medications, a family history of high cholesterol and being a smoker, according to WebMD. There are three different cholesterol numbers: high-density lipoprotein, or HDL, low-densi

www.reference.com/article/high-cholesterol-de28e9f6a3df5af8

According to WebMD, high cholesterol occurs when there is an excess amount of the lipid cholesterol in the bloodstream of a patient. Cholesterol is an essential lipid in the human body, but too much of it can be harmful.

www.reference.com/article/basic-cholesterol-26e811c2e9822ebc

Cholesterol is a fatlike substance that's found in the cells of the body, according to the National Heart, Lung and Blood Institute and WebMD. It is needed by the body to form the membranes of cells and manufacture vitamin D, certain hormones and other materials needed for good health.

www.reference.com/article/foods-lower-cholesterol-1fbca9da6879bde9

Oatmeal, salmon, walnuts, almonds and olive oil are among the foods used to lower cholesterol, according to Mayo Clinic. Foods containing plant stanols or sterols have also been shown to reduce cholesterol levels.

www.reference.com/article/foods-high-cholesterol-e3f520020ba7c476

Foods that contain high concentrations of cholesterol include butter, shortening, beef, sausage, processed meats, egg yolks and dairy products that are made with more than 1 percent milk fat. These foods should all be limited in people who have high serum cholesterol levels.