How can low-density lipoprotein (LDL) cholesterol cause atherosclerosis?

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Low-density lipoprotein-cholesterol (LDL-C) transports cholesterol in your blood to cells. Cholesterol is needed to build cells, make hormones and make bile acids. However, if there is too much LDL-cholesterol it will be deposited in blood vessel walls. This phenomenon is called atherosclerosis.