The Definitive Guide to Cholesterol
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Contrary to what we've been told, cholesterol didn't evolve to give us heart disease. It's not here to kill us. The actual roles of cholesterol in the body include insulating neurons, building and maintaining cellular membranes, participating in the immune response, metabolizing fat soluble vitamins, synthesizing vitamin D, producing bile, and kick-starting the body's synthesis of many hormones, including the sex hormones. Without cholesterol, it's true that we wouldn't have heart disease, but we also wouldn't be alive.
Given all the work cholesterol has to do, the liver is careful to ensure the body always has enough, producing some 1000-1400 milligrams of it each day. Dietary cholesterol is a relative drop in the bucket. And besides, the liver has sensitive feedback mechanisms that regulate cholesterol production in response to how much you get from your diet. Eat more cholesterol, make less in the liver. Eat less, make more in liver.
Now, if cholesterol is so important, why do we worry about it at all? How has it garnered such a bad reputation for giving us heart attacks?
