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Cutting Through the Cholesterol Confusion

Does cholesterol-free food protect your heart?
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Of all the information on the nutrition facts panel on food labels, cholesterol may be the most misunderstood.

Part of the confusion comes from the fact that cholesterol in food isn't the same thing as the cholesterol that clogs arteries. To be sure, foods high in cholesterol can cause blood levels of cholesterol to rise. But only about one in three people seem to be especially susceptible to the effects of cholesterol in food.

"And even then, dietary cholesterol isn't the biggest worry when it comes to heart disease," says Kathy McManus, MS, RD, director of nutrition for Brigham & Women's Hospital in Boston. "Studies show it's only about half as important as saturated fat and trans fat in raising serum cholesterol levels."

Cholesterol-Free Food: What Does It Mean?

All those factors can make it easy to get confused when you're trying to make a healthy choice at the grocery store. Many foods trumpet themselves as being cholesterol free or low in cholesterol. That's an easy claim to make. The main sources of dietary cholesterol are animal foods that don't carry nutrition facts labels, such as:

  • organ meats
  • eggs
  • shellfish

Cholesterol-free labels are misleading in another way. Foods loaded with saturated fat or trans fats can claim they contain zero cholesterol, but they're actually more of a threat to your heart and arteries than foods with a little cholesterol and less saturated fat.

Cholesterol and the Great Egg Debate

One source of confusion has long been eggs. A typical egg contains about 200 milligrams of cholesterol, but only 1.5 grams of saturated fat. When researchers first linked high blood cholesterol levels to heart disease, eggs got a bad rap.

But there's never been good evidence that eggs are a major factor in high blood cholesterol levels or a contributing cause of heart disease.

In fact, when researchers at Harvard Medical School analyzed data from almost 120,000 men and women, they found that eating the equivalent of an egg a day did not increase the risk of heart disease or stroke. A more recent Harvard Medical School study, published in 2008, also found that otherwise healthy men could eat up to seven eggs a day with little risk. The only danger showed up in men with diabetes, which is known to increase heart disease risk.

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