Yolk
or smoke -- the first is almost as bad for you as the second, London
researchers have found.
When it comes to raising your risk of heart attacks and strokes, eating
egg yolks is nearly as bad as smoking, the Western University researchers
found.
"If
you are at risk of heart attack and stroke, you shouldn't eat egg yolks,"
said Dr. David Spence, a Robarts Research Institute scientist.
"The problem is, if you expect to live a long time you are going to
be at risk of heart attacks and strokes," said Spence, who's also director
of the Stroke Prevention and Atherosclerosis Research Centre in London.
"Why would you want to be eating something that makes the plaque in
your arteries build up faster and make your heart attack and stroke come on
sooner?"
Western researchers studied 1,231 patients, using ultrasound to measure
plaque buildup on the inside wall of their arteries.
Most heart attacks and strokes are caused when built-up plaque ruptures.
Patients in the study filled out questionnaires about lifestyle and
medications, including consumption of egg yolks and cigarettes.
While the buildup of plaque was a straight-line increase for people after
age 40, it rose exponentially for smokers and regular egg yolk eaters.
Researchers also found people eating three or more egg yolks a week had
significantly more plaque on their artery walls than those eating
two or fewer yolks a week.
Eating yolks triggered plaque build-up at two-thirds the rate for people
who are smokers.
"In the long haul, eggs are not OK for most Canadians," Spence
said.
The research was published online Monday in the international journal
Atherosclerosis.
Monday, Egg Farmers of Canada rejected the study findings.
Karen Harvey, a nutrition officer and registered dietician with the
national group, said it's unfair to compare egg yolks with smoking.
"It goes without saying that smoking is considered one of the most
harmful activities when it comes to your personal health and wellness. We have
decades of clinical, scientific research that demonstrates no link between egg
consumption and an increased risk for heart disease," Harvey said.
Eggs are one of the most nutritious foods and the yolk a major source of
an egg's vitamins and minerals, she said.
The problem with egg yolks, Spence said, is the recommended daily intake
of cholesterol for people at risk of heart attack and strokes is less than 200
milligrams a day. But one jumbo egg yolk contains 237 mg of cholesterol.
There's
no problem consuming egg whites, which are an excellent source of protein, he
said.
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