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Chylomicrons are the largest type of lipoprotein, characterized by their high triglyceride content and low density. These particles are formed in the intestinal lining cells after the digestion of dietary fats. They are secreted into the lymphatic system and then enter the bloodstream, primarily transporting fats to tissues like heart muscle, skeletal muscle, and adipose tissue.123

Chylomicrons are composed of about 90% lipid, with triglycerides forming the core. They also contain cholesterol, cholesteryl esters, and phospholipids, surrounded by a protein layer. After delivering their lipid cargo, remnant chylomicrons are taken up by the liver, where their components are used to form other lipoproteins like very-low-density lipoproteins (VLDL). Disorders affecting lipoproteins, including chylomicrons, can lead to lipid deposition in arteries, a condition known as atherosclerosis.14

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