What is cholesterol, anyway?
Everyone talks about cholesterol, but few people actually understand what it is. In physical terms, it is a white fat - like substance with a consistency like candle wax that can be found nearly everywhere in the body: in the membranes of all cells, in the bile strored in the liver, in steroid hormones, and - most important for the purposes of this book - floating through the bloodstream in transport vehicles known as lipoproteins. Despite its bad rap, some cholesterol is vitally important for good health, as it is a major building block for many structures within our bodies - even our bones and teeth, as cholesterol is a precursor for vitamin D.
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