To understand why we're still having this conversation, we need to go back to the 1960s.
That's when scientists first started noticing a link between dietary cholesterol and heart disease. Cholesterol was found in plaque inside clogged arteries. Eggs have cholesterol—a lot of it compared to other foods. So a simple, logical leap was made: eat eggs, raise your cholesterol, get heart disease.
It made sense. It was intuitive. And it was wrong.
The problem was that scientists were confusing dietary cholesterol (what you eat) with blood cholesterol (what your body produces). The two are not the same. Your liver produces about 75% of the cholesterol in your blood. Only about 25% comes from the food you eat. And when you do eat cholesterol, your liver often compensates by producing less.
For most people, dietary cholesterol has a small, and in many cases negligible, effect on blood cholesterol.
But the message had already sunk in. Eggs became public enemy number one. Millions of people stopped eating yolks. Breakfast became a yolk-free zone. And the egg industry took a massive hit.
Then, slowly, the science caught up to the reality.
What the Latest Research Actually Says
Here's what the evidence shows, in plain language.
Dietary cholesterol does not equal blood cholesterol. Your body regulates cholesterol levels tightly. When you eat more cholesterol, your liver produces less. When you eat less, it produces more. For most people, dietary cholesterol has a modest effect on blood cholesterol levels, if any.
Saturated fat is the bigger culprit. The main driver of elevated LDL ("bad") cholesterol is not dietary cholesterol—it's saturated fat. Eating bacon, sausage, butter, and cheese with your eggs is far more harmful to your cholesterol profile than the eggs themselves.
Eggs can improve your cholesterol profile. Several studies have shown that eating eggs can actually increase HDL ("good") cholesterol and change the size of LDL particles to a less harmful, less atherogenic form.
Eggs are nutrient-dense in ways that matter. One egg contains 6 grams of high-quality protein, choline (critical for brain health), lutein and zeaxanthin (important for eye health), vitamin D, B12, and selenium. You'd need to eat a whole meal of other foods to get the same nutritional profile.
Eggs help with satiety and weight management. People who eat eggs for breakfast tend to eat fewer calories throughout the day. The protein and fat keep you full longer than a carb-heavy breakfast like cereal or toast.
There is no clear link between moderate egg consumption and heart disease in healthy people. A large 2018 meta-analysis of over 400,000 people found that eating up to one egg per day was not associated with increased risk of heart disease or stroke. Some studies even found a slight protective effect.
Who Should Be Careful With Eggs?
Before you go and eat a six-egg omelet every morning, let's talk about nuance.
While eggs are safe for most people, certain groups should be more mindful.
People with diabetes. Some studies have suggested a potential link between high egg consumption and increased cardiovascular risk in people with type 2 diabetes. Not all studies agree, but it's worth discussing with your doctor.
People with existing heart disease or high cholesterol. If you already have high cholesterol or known cardiovascular disease, your doctor may recommend limiting cholesterol intake—though even then, saturated fat is often a larger concern.
People with familial hypercholesterolemia. This is a genetic condition that causes extremely high cholesterol levels. People with this condition may need to limit dietary cholesterol more strictly.
People who eat a high-saturated-fat diet. If your breakfast is eggs with bacon, sausage, buttered toast, and cheese, the eggs aren't the problem. The saturated fat is. Eggs cooked in butter with a side of processed meat are very different from a veggie omelet with avocado.
