Entries in Egg Yolk (3)


Egg Study Not All It’s Cracked Up to Be

iStockphoto/Thinkstock(NEW YORK) -- A new study says eggs may be on par with cigarettes when it comes to heart health, but doctors and media critics say it’s not a fair comparison.

Researchers at Western University in Canada surveyed 1,200 patients about their egg and cigarette consumption and used ultrasound to measure the plaque in their arteries. They then concluded in the study, which was published in the journal Atherosclerosis, that people who ate more eggs over time had more plaque in their arteries, and equated eating eggs to smoking cigarettes.

The study’s lead researcher, Dr. David Spence, said in a press release that his study has shown that yolks make plaque build up more quickly in the arteries, “about two-thirds as much as smoking,” adding, “in the long haul, egg yolks are not okay for most Canadians.”

But cardiologists say the study shouldn’t be taken so seriously because the research is flawed.

“This is very poor quality research that should not influence patient’s dietary choices,” said Dr. Steven Nissen, who chairs the department of Cardiovascular Medicine at the Cleveland Clinic Foundation, in an email. “It is extremely important to understand the differences between ‘association’ and ‘causation.’”

Nissen said the researchers relied on patients to recall how many eggs they consumed, but asked them once and assumed it remained constant, which isn’t reliable. He said the way researchers measured patients’ plaque has come under “considerable criticism,” and that researchers failed to adjust for other dietary factors.

Dr. David Frid, a cardiologist at the Cleveland Clinic, told ABC News he doesn’t think smoking should be equated with eating eggs because eggs have an indirect rather than direct impact on heart disease. The eggs have to first increase cholesterol to create plaque build-up. The impact of smoking on heart disease is direct because smoking causes arteries to become inflamed, which prompts the body to respond with plaque.

He said the study fails to take exercise or other dietary habits into account. Study participants could have consumed more salt, or they could have been on cholesterol-reducing drugs, too.

“It may be that people who consume a lot of eggs also consume a lot of other fatty foods,” Frid said, adding that how the egg is prepared should also be taken into account.

Dr. Jorge Plutzky, the Director of the Vascular Disease Program at Brigham and Women’s Hospital, said that the study authors explained the limitations of their study, which includes the potential for other variables to mask results and errors inherent in having patients self-report their egg consumption.

He said what the study really does is generate “a clue or suggestion” that needs to be revisited. It is not conclusive.

Dr. Richard Besser, the Chief Health and Medical Editor, of ABC News, spoke about the egg study on Good Morning America Wednesday morning.

“Eggs keep getting a bum rap,” Besser said. “First they’re really good for you, and then they’re bad for you, and this is another one where they’re bad for you.  But there are a number of things that affect your cholesterol that they didn’t look at that people can really pay attention to.”

Besser suggested exercising, reducing saturated fats, and maintaining a healthy weight. He said an egg a day is fine, unless you have heart disease, in which case limiting consumption to four eggs a week is a good idea.

“Eggs are a great source of balanced protein and many vitamins,” he said. “If you do it in moderation, it’s a great part of your diet.”

Copyright 2012 ABC News Radio


Are Egg Yolks as Bad as Cigarettes?

iStockphoto/Thinkstock(NEW YORK) -- A new study suggests regular consumption of egg yolks can be just as bad for heart health as regular cigarette use.

Watch the Good Morning America report:

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Copyright 2012 ABC News Radio


Egg Yolk, Soybean Oil Drip to Treat Infertility?

iStockphoto/Thinkstock(LONDON) -- Four rounds of in-vitro fertilization couldn’t help Sara Conyers conceive, according to the U.K.’s  Daily Mail.

But the fifth time was the charm for Conyers, 33, who now has twins. Conyers says the only way she could get pregnant was with the help of an experimental fertility method called intralipid infusion, Conyers, who lives in the U.K., told the Daily Mail.

The procedure, more commonly used in the U.K. than in the U.S., is used to supplement another fertility treatment, such as in-vitro fertilization.  The woman is intravenously given a fat solution consisting partly of soybean oil and egg yolk.

Some experts who tout its success say it can prevent miscarriage by limiting activity of overactive so-called natural killer immune cells found in the body that would otherwise destroy the embryo.

But many fertility experts in the U.S. are not so sure about its effectiveness, since there are no definitive studies to suggest that the method works or is even safe.

“Before I can endorse this theoretical therapy for my patients, I need at least some evidence,” said Dr. Michael Murray, director of reproductive endocrinology and infertility at Northern California Fertility Medical Center.

This procedure is one of many that some of Murray’s patients ask him about, who are “grasping at straws for a solution to their recurrent miscarriages,” he says.

And some experts agreed, comparing the fertility-boosting procedure to others that are seemingly inexpensive with unknown risks for side effects, such as herbal supplements.

Previous studies done on animals or in lab dishes have found conflicting results about whether intralipid infusion works. Studies are also conflicted about the role that natural killer cells play in fertility.

“Most of the time when IVF fails, it is due to the quality of the embryos that were transferred and not the immune environment in the uterus,” said Dr. Tamer Yalcinkaya, section head of reproductive endocrinology and infertility at Wake Forest Baptist Medical Center.

If the scientific evidence supported the claims, intralipid infusion may benefit women with good quality embryos who have undergone previous IVF cycles but haven’t yet been able to conceive, said Yalcinkaya.

As for Conyers’ multiple unsuccessful IVF tries followed by one supplemented by intralipid infusion that worked, some experts say it’s hard to tell what part of that equation turned out to be the tipping point for Conyers.

“Success of a repeat IVF cycle may be a chance event and does not necessarily indicate that the need of an intervention was the cause of that improvement,” said Yalcinkaya.

Copyright 2012 ABC News Radio

ABC News Radio