I saw an ad for Crestor on the lowcarber.org website. I know lowcarber.org is not responsible for what's in those ads, but I followed the ad and thought that what the Crestor people were saying might be of interest. From the Crestor site:
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What is cholesterol? It's a waxy substance that's produced by the liver. It's also found in the foods we eat that come from animals, like meats, eggs yolks, shellfish, and whole milk dairy products.
Who needs cholesterol? We all do. Our bodies need cholesterol to function. But too much cholesterol can be bad for our health.
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This is all true, though misleading. Dietary cholesterol, I think we have come to understand, is not relevant to blood cholesterol. And blood cholesterol is only harmful in certain contexts.
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When our bodies make too much cholesterol or too much is absorbed from the foods that we eat, it gets deposited in our arteries as plaque.
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The cause of the deposits is not necessarily the production of "too much cholesterol," but, I think, has more to do with much more complex issues of blood chemistry. And since blood cholesterol is not caused by dietary cholesterol, but rather is made by the liver, the statement about "too much ... absorbed from the foods we eat" is simply false.
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Whether you have high cholesterol can depend on your family history. Some people inherit genes associated with elevated levels of cholesterol. This is called familial hypercholesterolemia. These people may eat well and exercise, and still have high cholesterol. For others, diet and lifestyle determine cholesterol levels. The more fats they eat, especially from meat and dairy products, the higher their cholesterol levels may be.
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They are leading the gullible reader down the rosy path. Indeed, cholesterol levels are related to genetic inheritance. But, even though it is "called" familial hypercholesterolemia, what this really might mean is that "normal" cholesterol -- by which I would mean non-pathogenic levels of cholesterol -- may be higher for some than for others. Much higher. But by giving this inherited condition the name of a disease, the reader is set up to consider treating the disease. And the statement about "the more fats they eat" is probably quite simply false. Certainly some fats, and "especially from meat and dairy products," are
not the cause of high cholesterol.
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How do you know if your cholesterol is high? Many people don't. High cholesterol is what's often referred to as a "silent disease." People with high cholesterol usually don't have any symptoms. That's why it's so important for adults to make sure they get a cholesterol screening at least every 5 years.
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It's very important for the bottom line of the makers of Crestor, indeed. If you don't know the truth about cholesterol, and you get that test, many healthy Americans will be advised to use cholesterol-lowering drugs. All of which can make you sick. They "don't have any symptoms," indeed. It's true that atherosclerosis in the early stages is asymptomatic; but cholesterol tests don't measure the degree of atherosclerosis, they measure ... cholesterol. Which is not a disease, but only speculatively a marker of a possible disease process. If you want to find out if you have early atherosclerosis, blood cholesterol simply won't tell you. Fractionated LDL might actually measure risk, but most cholesterol tests don't go into that detail. And all of this is not really very well understood, it seems. To actually know what is going on with the arteries, imaging the arteries with a CAT scan or some other direct means may be necessary. Cardiac CRP *may* give some indication. Instead of taking Crestor, perhaps taking low-dose aspirin would reduce actual risk more. But this won't fatten the profits of any drug company, so who is going to fund the research?
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Bad and good cholesterol
There are two main types of cholesterol that can affect your health:
"Bad" cholesterol
Low-density lipoproteins, or LDL, are known as the bad cholesterol that can clog your arteries and put you at risk for heart disease.
"Good" cholesterol
High-density lipoproteins, or HDL, have been nicknamed good cholesterol because it actually helps remove bad cholesterol from the body.
There is a third type of cholesterol, called very-low-density lipoprotein, or VLDL. VLDL contains a kind of fat called triglycerides. High triglycerides, like high cholesterol, can put you at risk for heart disease.
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They don't tell you that some LDL cholesterol is "good." They don't tell you to get your LDL analyzed. They don't encourage you to get your triglycerides analzed. Is this because, if they did, you might not think you need to take Crestor?
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CRESTOR has not been shown to prevent heart attacks, heart disease, or strokes.
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At last, a breath of honesty. Now, what Crestor does is to lower cholesterol (not a lot, I think, but a little). Why would we want to lower cholesterol? To avoid "heart attacks, heart disease, or strokes." But the fact is that it has not been shown that lowering cholesterol will prevent these problems. Suppose someone did a study that showed that, in the U.S., black hair is associated with heart disease. (It might be.) And we find that we can change the color of hair with a drug. Would this lower the incidence of heart disease? Maybe, it depends. You'd have to study it. Now, why are we spending perhaps hundreds of millions of dollars a year to lower cholesterol with drugs, if the ultimate effect has never been studied? I can tell you why. Money and politics. Not medical science.
On another page on the Crestor site:
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Diet
If you need to lower your cholesterol, there are two important steps you should take right away:
1. Follow a low-fat, low-cholesterol diet
2. Lose weight if you are overweight
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They certainly aren't going to tell you to go on a low-carb diet, for if you do, you might not need Crestor at all. (To be fair, they are giving the standard, ineffective advice. Low-fat diets are not as effective as low-carb diets for losing weight; indeed, many people gain weight trying to follow low-fat diets. And, once again, dietary cholesterol is not relevant to blood cholesterol; their dietary advice goes on to suggest avoiding butter, etc. In this case, that the advice is ineffective helps increase their sales. Now, what happens when some AstraZeneca employee sends a memo to management about the evidence demolishing the sat-fat/cholesterol/heart disease myth. Does it get shredded?)
Suggestion: don't trust drug companies for advice about nutrition. They have a conflict of interest. And don't trust advice from doctors who get their information from drug companies; they may mean well, but many doctors are overwhelmed with information and have a shortage of time. Unfortunately, this may be most of them.There is no substitute, really, for being personally informed about nutritional realities. Caveat emptor.