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An egg a day helps lower risk of heart disease

A Chinese study suggests that people who eat an egg just about every day may have a lower risk of heart attack and stroke than individuals who don’t eat eggs at all.

Researchers examined survey data on egg consumption among 461,213 adults who were 51 years old on average. When they joined the study, none had a history of heart disease. Overall, they ate an average of half an egg daily; about 9 percent of them avoided eggs altogether while 13 percent ate roughly one egg every day.

At least half of the participants were followed for nine years or more. During that time, 83,977 people developed heart disease or had a heart attack or stroke, and 9,985 died from these conditions.

The study shows that compared to people who never ate eggs, individuals who ate an average of 0.76 eggs per day were 11 percent less likely to develop cardiovascular diseases and 18 percent less likely to die from these conditions.

“This is important to people, especially those in the part of the world where eggs are major sources of high-quality proteins and other important nutrients for the body,” said Dr. Luc Djousse, a researcher at Harvard Medical School in Boston.

“The take-home message from this is that when consumed in moderation, there does not appear to be an elevated risk of developing heart disease or stroke,” said Djousse.

But that doesn’t mean people should be rushing to make a three-egg omelet every day for breakfast.

“Eggs are not safe for anyone at risk of heart attacks or strokes, but particularly not for diabetics,” said Dr. J. David Spence of the Western University Stroke Prevention & Atherosclerosis Research Center in London, Ontario.

“Eggs increase the risk of vascular disease,” Spence, who wasn’t involved in the study, said by email. For example, egg yolks contain phosphatidylcholine, a chemical that can contribute to clogged arteries, he said.

Eggs are a primary source of dietary cholesterol, but they also contain high-quality lean protein and many vitamins, the study team notes in the journal Heart. Previous research on the link between eggs and heart disease have offered inconsistent results, with some pointing to a protective effect and others suggesting that eggs might make people more likely to have a heart attack or stroke.

Another limitation is that the results in China might not apply in other parts of the world. The study participants were typically a healthy weight, and most of them didn’t have high blood pressure or a family history of heart disease.

In the U.S. – where most adults are overweight or obese and eat a Western diet heavy on meat and potatoes and light on fruits and vegetables – the connection between eggs and heart disease might look quite different.

For optimal heart health, the AHA recommends the Dietary Approaches to Stop Hypertension (DASH) diet or a Mediterranean-style diet. Both diets emphasize unsaturated vegetable oils, nuts, fruits, vegetables, low-fat dairy products, whole grains, fish and poultry, and both limit red meat, as well as foods and drinks high in added sugars and salt.

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