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In a recent study of 1,231 men and women, researches have found that egg yolks contribute to plaque build up in the arteries which is similar to affects of smoking.

Amoung the 20% of participants who ate the most eggs, the carotid plaque build-up was about two-thirds that of the study’s heaviest smokers. The researchers concluded that the plaque increase from eating eggs “follows a similar pattern to that of cigarette smoking.”

Arterial accumulation of plaque is a key risk factor for heart attack and stroke. As plaque builds up, it thickens artery walls and narrows the space through which blood can flow, forcing the heart to pump harder. If plaques become unstable, they can break off and form clots, which can halt blood flow to either the brain or the heart, causing stroke or heart attack.

The authors argue that their findings should quell doubts over the link between high dietary cholesterol and heart disease. “The prevailing tendency to ignore dietary cholesterol as a risk factor for coronary heart disease requires reassessment, including the consumption of cholesterol from eggs,” the authors wrote.

The government’s dietary guidelines recommend that adults consume no more than 300 mg of cholesterol a day. One whole egg contains about 180 mg of cholesterol, nearly two-thirds of your daily recommended ma.

However, health experts have found the study to be seriously flawed.

Dr. Steven Nissen, who chairs the department of Cardiovascular Medicine at the Cleveland Clinic Foundation pointed out some of the problems with the study:

There were no controls in the study and it is noted that causation and association are not the same thing.

The study was also not adjusted for the existing dietary habits of the participants.

What is the best thing to eat first thing in the morning?

Although the ingredients are varied, the consensus is that fruit, whole grains and protein is the best combination to keep you satisfied and energized throughout the day.

Eggs with a side of berries, oatmeal with nuts and whole grains with cottage cheese are nutritionally dense breakfast ideas that should appeal to many.

Eating protein in the morning can reduce cravings and hunger throughout the day, according to a 2011 study published in Obesity. “Incorporating a healthy breakfast containing protein-rich foods can be a simple strategy for people to stay satisfied longer, and therefore, be less prone to snacking,” study author Heather Leidy, assistant professor in the department of nutrition and exercise physiology at the University of Missouri, said in a statement at the time.

Starting your day off with a healthy breakfast sets the tone for the rest of the day, gives you the energy you need to tackle your tasks and keeps satisfied enough to fight off food cravings.