Egg and Cholesterol – How Many Eggs Can You Safely Eat?

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An Egg is both nutritious and safe to eat. Many people are concerned about cholesterol levels in eggs. Here we’ll explain how you can safely include eggs as part of your healthy food choices.

A whole egg contains all the nutrients needed to turn a single cell into an entire baby chicken.

However, eggs have gotten a bad reputation because the yolks are high in cholesterol.

In fact, a single medium sized egg contains 186 mg of cholesterol, which is 62% of the recommended daily intake.

People believed that if you ate cholesterol, that it would raise cholesterol in the blood and contribute to heart disease.

But it turns out that it isn’t that simple. The more you eat of cholesterol, the less your body produces instead.

Let me explain how that works…

How Your Body Regulates Cholesterol Levels

 

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Cholesterol is often seen as a negative word.

When we hear it, we automatically start thinking of medication, heart attacks and early death.

But the truth is that cholesterol is a very important part of the body. It is a structural molecule that is an essential part of every single cell membrane.

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It is also used to make steroid hormones like testosterone, estrogen and cortisol.

Without cholesterol, we wouldn’t even exist.

Given how incredibly important cholesterol is, the body has evolved elaborate ways to ensure that we always have enough of it available.

Because getting cholesterol from the diet isn’t always an option, the liver actually produces cholesterol.

But when we eat a lot of cholesterol rich foods, the liver starts producing less (1, 2).

So the total amount of cholesterol in the body changes only very little (if at all), it is just coming from the diet instead of from the liver (3, 4).

Bottom Line: The liver produces large amounts of cholesterol. When we eat a lot of eggs (high in cholesterol), the liver produces less instead.

What Happens When People Eat Several Whole Eggs Per Day?

 

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For many decades, people have been advised to limit their consumption of eggs, or at least of egg yolks (the white is mostly protein and is low in cholesterol).

Common recommendations include a maximum of 2-6 yolks per week. However, there really isn’t much scientific support for these limitations (5).

Luckily, we do have a number of excellent studies that can put our minds at ease.

In these studies, people are split into two groups… one group eats several (1-3) whole eggs per day, the other group eats something else (like egg substitutes) instead. Then the researchers follow the people for a number of weeks/months.

These studies show that:

  • In almost all cases, HDL (the “good”) cholesterol goes up (6, 7, 8).
  • Total and LDL cholesterol levels usually don’t change, but sometimes they increase slightly (9, 10, 11, 12).
  • Eating Omega-3 enriched eggs can lower blood triglycerides, another important risk factor (13, 14).
  • Blood levels of carotenoid antioxidants like Lutein and Zeaxanthin increase significantly (15, 16, 17).

It appears that the response to whole egg consumption depends on the individual.

In 70% of people, it has no effect on Total or LDL cholesterol. However, in 30% of people (termed “hyper responders”), these numbers do go up slightly (18).

That being said, I don’t think this is a problem. The studies show that eggs change the LDL particles from small, dense LDL to Large LDL (19, 20).

People who have predominantly large LDL particles have a lower risk of heart disease. So even if eggs cause mild increases in Total and LDL cholesterol levels, this is not a cause for concern (21, 22, 23).

The science is clear that up to 3 whole eggs per day are perfectly safe for healthy people who are trying to stay healthy.

Bottom Line: Eggs consistently raise HDL (the “good”) cholesterol. For 70% of people, there is no increase in Total or LDL cholesterol. There may be a mild increase in a benign subtype of LDL in some people.

Egg and Heart Disease

Egg

Many studies have looked at egg consumption and the risk of heart disease.

All of these studies are so-called observational studies. In studies like these, large groups of people are followed for many years.

Then the researchers use statistical methods to figure out whether certain habits (like diet, smoking or exercise) are linked to either a decreased or increased risk of some disease.

These studies, some of which include hundreds of thousands of people, consistently show that people who eat whole eggs are no more likely to develop heart disease. Some of the studies even show a reduced risk of stroke (24, 25, 26).

However… one thing that is worth noting, is that these studies show that diabetics who eat eggs are at an increased risk of heart disease (27).

Whether the eggs are causing the increased risk in diabetics is not known. These types of studies can only show a correlation and it is possible that the diabetics who eat eggs are, on average, less health conscious than those who don’t.

This may also depend on the rest of the diet. On a low-carb diet (by far the best diet for diabetics), eggs lead to improvements in heart disease risk factors (28, 29).

Bottom Line: Many observational studies show that people who eat eggs don’t have an increased risk of heart disease, but some of the studies do show an increased risk in diabetics.

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Eggs Have Plenty of Other Health Benefits Too

Woman smiling and holding an egg

Let’s not forget that eggs are about more than just cholesterol… they’re also loaded with nutrients and have various other impressive benefits:

  • They’re high in Lutein and Zeaxanthin, antioxidants that reduce your risk of eye diseases like Macular Degeneration and Cataracts.
  • They’re very high in choline, a brain nutrient that over 90% of people are lacking in.
  • They’re high in quality animal protein, which has many benefits – including increased muscle mass and better bone health (33, 34).
  • Studies show that eggs increase satiety and help you lose weight (35, 36).

Eggs also taste amazing and are incredibly easy to prepare.

So even IF eggs were to have mild adverse effects on blood cholesterol (which they don’t), the benefits of consuming them would still far outweigh the negatives.

Bottom Line: Eggs are among the most nutritious foods on the planet. They contain important brain nutrients and powerful antioxidants that can protect the eyes.

How Much is Too Much?

Chicken and Egg, Smaller

Canada’s Food Guide recommends 2-3 servings of Meat and Alternatives every day for adults. Since eggs are nutrient rich, 2 eggs are equal to one serving from the Meat and Alternatives food group

Unfortunately, we don’t have studies where people are fed more than 3 eggs per day.

It is possible (although unlikely) that eating even more than that could have a detrimental effect on health. Eating more than 3 is uncharted territory, so to speak.

One egg contains about 186 mg of cholesterol, which is found mostly in the yolk. As with most foods, eggs should be eaten in moderation. Eggs can be a healthy food choice when you limit other foods with saturated and trans fat. 

A healthy person without high blood cholesterol, diabetes or a history of heart disease can eat an average of one whole egg per day. This does not increase your risk for cardiovascular disease.

If you have high blood cholesterol, diabetes or heart disease, you should limit your intake of whole eggs to two or less per week. This will help prevent cardiovascular disease. Limit your consumption of eggs along with other foods high in cholesterol, saturated and trans fat.

It’s also important to keep in mind that not all eggs are the same. Most eggs at the supermarket are from chickens that are raised in factories and fed grain-based feeds.

The healthiest eggs are Omega-3 enriched eggs, or eggs from hens that are raised on pasture. These eggs are much higher in Omega-3s and important fat-soluble vitamins..

Overall, eating eggs is perfectly safe, even if you’re eating up to 3 whole eggs per day.

I personally eat 3-6 whole eggs per day (about 30-40 per week) and my health has never been better.

Given the incredible range of nutrients and powerful health benefits, quality eggs may just be the healthiest food on the planet.

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