Cholesterol is an essential building block of every cell in the body, required for all metabolic processes. It is particularly important in the production of nerve tissue, bile and certain hormones. On average, our body produces about half of a gram to one gram of cholesterol per day, depending on how much of it the body needs at the time. By and large, our body is able to produce 400 times more cholesterol per day than what we would obtain from eating 3,5 ounces (100 grams) of butter. The main cholesterol producers are the liver and the small intestine, in that order. Normally, they are able to release cholesterol directly into the blood stream, where it is instantly tied to blood proteins. These proteins, which are called lipoproteins, are in charge of transporting the cholesterol to its numerous destinations. There are three main types of lipoproteins in charge of transporting cholesterol: Low Density Lipoprotein (LDL), Very Low Density Lipoprotein (VLDL), and High Density Lipoprotein (HDL).
In comparison to HDL, which has been privileged with the name ‘good’ cholesterol, LDL and VLDL are relatively large cholesterol molecules; in fact, they are the richest in cholesterol. There is good reason for their large size. Unlike their smaller cousin, which easily passes through blood vessel walls, the LDL and VLDL versions of cholesterol are meant to take a different pathway; they leave the blood stream in the liver.
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Tuesday, February 26, 2008
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