The liver is responsible for managing the levels of LDL in the body. It manufactures and secretes LDL into the bloodstream. There are receptors on liver cells that can "monitor" and try to adjust the LDL levels. However, if there are fewer liver cells or if they do not function effectively, the LDL level may rise.
Diet and genetics both play a factor in a person's cholesterol levels. There may be a genetic predisposition for familial hypercholesterolemia (hyper=more = cholesterol + emia=blood) where the number of liver receptor cells is low and LDL levels rise causing the potential for atherosclerotic heart disease at a younger age.
In the diet, cholesterol comes from saturated fats that are found in meats, eggs, and dairy products. Excess intake can cause LDL levels in the blood to rise. Some vegetable oils made from coconut, palm, and cocoa are also high in saturated fats.
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