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Cholesterol and other fats can’t dissolve in your blood. To travel to your cells, they use special carriers called lipoproteins. Lowdensity lipoprotein (LDL) cholesterol is often called “the bad kind.” When you have too much LDL cholesterol in your blood, it can join with fats and other substances to build up in the inner walls of your arteries. The arteries can become clogged and narrow, and blood flow is reduced. If a blood clot forms and blocks the blood flow to your heart, it causes a heart attack. If a blood clot blocks an artery leading to or in the brain, a stroke results. A “good kind” of cholesterol, on the other hand, is called high-density lipoprotein (HDL). It carries harmful cholesterol away from the arteries and helps protect you from heart attack and stroke. It’s better to have a lot of HDL cholesterol in your blood.
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