The latest US research on eggs won't go over easily for those who can't eat breakfast without them.
Adults who ate about 1 1/2 eggs daily had a slightly higher risk of heart disease than those who did not eat eggs. The study showed the more eggs the greater the risk. The chances of dying early were also elevated.
The researchers say the culprit is cholesterol found in egg yolks and other foods, including shellfish, dairy products and red meat. The study focused on eggs as they are among the most common edible cholesterol-rich foods. They may still be part of a healthy diet, but in smaller quantities than many Americans have become accustomed to, researchers say.
American diets guidelines that relieved cholesterol limits have helped eggs to make a recurrence.
The study has limitations and opposes new research, but is likely to resume the prolonged debate on eggs.
The new results were published on Friday Friday in the Journal of the American Medical Association.
Researchers at Northwestern University's Feinberg School of Medicine and elsewhere gathered results from six previous studies, analyzed data on nearly 30,000 American adults who reported self-reported daily food intake. Participants were followed on average for about 17 years.
The researchers estimated that those who ate 300 milligrams of cholesterol daily – about 1 1/2 eggs – were 17 percent more likely to develop heart disease than who did not eat eggs.
The researchers based their conclusions on what the participants said they ate at the beginning of each study. They took into account high blood pressure, smoking, obesity and other properties that could contribute to heart problems. Risks were found with eggs and cholesterol in general; A separate analysis was not made for each cholesterol-rich food.
Dr. Bruce Lee from Johns Hopkins University, says nutrition studies often say weak because they trust people to remember what they are eating.
"We know that dietary recall can be terrible," Lee says. The new study only offers observation data but does not show that eggs and cholesterol caused heart disease and death, says Lee, who was not involved in the research.
Senior author Norrina Allen, a preventative medical specialist, noted that the study lacks information on whether the participants at the egg cooked, poached, fried or encrypted in butter, which she said may affect health risks.
Some believe I can eat as many eggs as I want, but the results suggest that moderation is a better approach, she said.
Eggs are a leading source of dietary cholesterol, which was once thought to be strongly related to cholesterol levels in the blood and heart disease. Older studies suggesting that the link led to nutritional guidelines almost a decade ago that recommended not consuming more than 300 milligrams of cholesterol daily. An egg contains about 186 milligrams.
Recent research questioned that the finding of saturated fats contributes more to unhealthy levels of cholesterol in the blood that can lead to heart problems.
The latest US Government Nutrition Guidelines, from 2015, removed the strict daily cholesterol limit. Although eating as little cholesterol as possible is still recommended, the recommendations say that eggs can still be included in a healthy diet, as a good source of protein, along with lean meat, poultry, beans and nuts. Nutrition experts say the new study is unlikely to change that counseling.
Dr. Frank Hu from Harvard University noted that most previous studies have shown that eating some eggs every week is not linked to the risk of heart disease in commonly healthy people.
"I don't think this study would change general healthy eating guidelines", which emphasize fruits, vegetables, whole grains, nuts and beans, and limits processed meat and sugar, Hu said. Eggs, a breakfast bar for many, may be included but other options should also be considered, "like whole grain toast with butter nuts, fresh fruit and yogurt," Hu said.
Dr. Rosalind Coleman, a professor of nutrition and pediatrician at the University of North Carolina, offered broader advice.
"The main message for the public is not to choose a single type of food as" bad "or" good "but to evaluate your overall diet in terms of variety and variety.
"I'm sorry if it seems like a boring recommendation," she added, but for most people, the main dietary advice "should be to maintain a healthy weight, exercise and get a sufficient amount of sleep."
Follow AP Medical Writer Lindsey Tanner at @LindseyTanner.
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