According to a study out of the University of Sydney, which was recently published in The American Journal of Clinical Nutrition, they don't cause heart disease.
How was the study conducted?
Researchers recruited 128 participants for a weight-maintenance study. They were split into two groups: the first group was told to consume just two eggs per week, while the other were instructed to eat 12 eggs per week. After that, they were put on a weight loss diet for another three months. Here, participants were told to omit saturated fats. These include butter and lard, which lead to atherosclerosis—the hardening of the arteries. They were to be replaced with monounsaturated and polyunsaturated fats, including olive oil and avocado. These help maintain proper cardiovascular health.
Over another 12 months, participants were told to continue with whatever type of egg diet they’d been prescribed. In the end, each volunteer underwent a number of tests to see if the cardiovascular system was affected, and if so how. Throughout the study, researchers monitored each participant’s blood pressure, blood sugar, and cholesterol.
In the past, nutritional scientists mistakenly gave eggs a bad name. Image credit: Pixababy.
What did they find?
Regardless of how many or how few eggs they ate, participants’ heart health stayed more or less the same. Bottom line: it didn’t matter how many eggs they ate because there were no cardiovascular effects. Egg consumption didn’t correlate with weight outcomes either. “Despite differing advice around safe levels of egg consumption for people with pre-diabetes and type 2 diabetes,” Dr. Fuller said, “our research indicates people do not need to hold back from eating eggs.”
How many eggs are safe to eat per week?
The results show that eggs are a great dietary addition to most diets; particularly those patients with pre-diabetes and even type 2 diabetes. Researchers found that up to 12 eggs per week is fine, even for those with the aforementioned pre-diabetes or type 2 diabetes. Such findings support a 2015 study which gave similar results.
Dr. Fuller was quoted as saying:
While eggs themselves are high in dietary cholesterol – and people with type 2 diabetes tend to have higher levels of the ‘bad’ low density lipoprotein (LDL) cholesterol. This study supports existing research that shows consumption of eggs has little effect on the levels of cholesterol in the blood of the people eating them. Eggs are a source of protein and micro-nutrients that could support a range of health and dietary factors including helping to regulate the intake of fat and carbohydrate, eye and heart health, healthy blood vessels and healthy pregnancies.