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Cholesterol is a fat molecule that is insoluble in water like plasma. For this reason, fat is carried in the blood circulation in the form of a semi-emulsion, joining proteins and other fats and forming lipoproteins.
Lipoproteins differ quantitatively and qualitatively in the amount of fat and protein used in their structure, and this difference causes differences in their performance. The most important classification factor is based on the difference in their density and the types called HDL (high density lipoprotein). LDL (low-density lipoprotein). VLDL (very low density lipoprotein) and some intermediate compounds that arise in the stages of fat metabolism. includes Approximately 50% of HDL consists of fats, of which 20% is cholesterol.
HDL plays an important role in removing cholesterol from the cells and thus cleaning the cells. Many epidemiological studies confirm this substance and its concept (good cholesterol). Therefore, HDL cholesterol, when there is an imbalance in the ratio of total cholesterol to HDL cholesterol or the ratio of LDL cholesterol to HDL, is considered an important factor for assessing the risk of developing lesions in the arterial wall.
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