Eggs and Cholesterol: New Insights

The role of eggs in a healthy diet has been a topic of ongoing discussion, especially concerning their cholesterol levels. But, surprisingly, new research suggests that perhaps eggs aren’t as harmful to cholesterol as once thought.

Australian researchers recently conducted a study examining how dietary cholesterol and saturated fats affect LDL cholesterol—often labeled as “bad cholesterol.” It’s widely acknowledged that high cholesterol is a significant risk factor for cardiovascular disease, which is a leading cause of mortality.

A randomized controlled study published in the American Journal of Clinical Nutrition involved 61 adults with high LDL cholesterol. Participants were assigned different diets for five weeks. These included a diet high in cholesterol and low in saturated fat with two eggs daily, a cholesterol-free diet, and a control group consuming one egg per week with higher cholesterol and saturated fats.

Interestingly, the findings revealed that a diet with two eggs daily, when combined with low saturated fats, actually reduced LDL cholesterol more effectively than a diet without eggs. Across all diets studied, saturated fat intake showed a positive correlation with LDL cholesterol, while dietary cholesterol from sources like eggs didn’t have the same effect.

John Buckley, an executive dean at the University of South Australia, shared that the key takeaway is this: while high-cholesterol foods may sound alarming, it’s really the saturated fats that impact “bad” cholesterol levels. Notably, most foods high in cholesterol also tend to be high in saturated fats—except eggs, which, strangely enough, are rich in cholesterol but low in saturated fats.

These results align with the FDA’s December 2024 statement that classified eggs as “healthy” amidst growing evidence that dietary cholesterol doesn’t raise bad cholesterol levels.

Robin Decicco, a certified holistic nutritionist in New York, reiterated that eggs can fit into a balanced diet. She pointed out that each egg offers around 6 grams of protein as well as various vitamins and antioxidants. “For many years, we believed that dietary cholesterol would spike cholesterol levels, but recent studies indicate that saturated fat is the primary culprit,” she noted.

Decicco suggested that it’s essential to be mindful of where saturated fats come from, predominantly found in dairy and processed meats. Eggs, on the other hand, contain very little saturated fat and even have beneficial fats like monounsaturated and omega-3 fats. With only about 2 grams of saturated fat per egg, the American Heart Association recommends keeping daily saturated fat to around 12-13 grams on a standard 2,000-calorie diet.

She also provided a practical tip: for those opting for a breakfast of bacon and eggs, swapping out bacon for additional eggs could help maintain healthier cholesterol levels.