Health benefits of egg confirmed by humans
Here are 10 health benefits of eggs that have been confirmed in human studies.
1. Incredibly Nutritious
Eggs are among the most nutritious foods on the planet.
A whole egg contains all the nutrients required to turn a single cell into a baby chicken.
A single large boiled egg contains (1):
Vitamin A: 6% of the RDA
Folate: 5% of the RDA
Vitamin B5: 7% of the RDA
Vitamin B12: 9% of the RDA
Vitamin B2: 15% of the RDA
Phosphorus: 9% of the RDA
Selenium: 22% of the RDA
Eggs also contain decent amounts of vitamin D, vitamin E, vitamin K, vitamin B6, calcium and zinc
This comes with 77 calories, 6 grams of protein and 5 grams of healthy fats.
Eggs also contain various trace nutrients that are important for health.
In fact, eggs are pretty much the perfect food. They contain a little bit of almost every nutrient you need.
If you can get your hands on pastured or omega-3 enriched eggs, these are even better. They contain higher amounts of omega-3 fat and are much higher in vitamin A and E (2, 3).
Whole eggs are among the most nutritious foods on the planet, containing a little bit of almost every nutrient you need. Omega-3 enriched and/or pastured eggs are even healthier.
2. High in Cholesterol, but Don’t Adversely Affect Blood Cholesterol
It is true that eggs are high in cholesterol.
In fact, a single egg contains 212 mg, which is over half of the recommended daily intake of 300 mg.
However, it’s important to keep in mind that cholesterol in the diet doesn’t necessarily raise cholesterol in the blood (4, 5Trusted Source).
The liver actually produces large amounts of cholesterol every single day. When you increase your intake of dietary cholesterol, your liver simply produces less cholesterol to even it out (6Trusted Source, 7Trusted Source).
Nevertheless, the response to eating eggs varies between individuals (8Trusted Source):
In 70% of people, eggs don’t raise cholesterol at all
In the other 30% (termed “hyper responders”), eggs can mildly raise total and LDL cholesterol
However, people with genetic disorders like familial hypercholesterolemia or a gene variant called ApoE4 may want to limit or avoid eggs.
Eggs are high in cholesterol, but eating eggs does not adversely affect cholesterol in the blood for the majority of people.
3. Raise HDL (The “Good”) Cholesterol
HDL stands for high-density lipoprotein. It is often known as the “good” cholesterol (9).
People who have higher levels of HDL usually have a lower risk of heart disease, stroke and other health problems (10, 11Trusted Source, 12Trusted Source, 13Trusted Source).
Eating eggs is a great way to increase HDL. In one study, eating two eggs per day for six weeks increased HDL levels by 10% (14Trusted Source, 15Trusted Source, 16Trusted Source).
Eating eggs consistently leads to elevated levels of HDL (the “good”) cholesterol, which is linked to a lower risk of many diseases.
4. Contain Choline — an Important Nutrient That Most People Don’t Get Enough Of
Choline is a nutrient that most people don’t even know exists, yet it is an incredibly important substance and is often grouped with the B vitamins.
Choline is used to build cell membranes and has a role in producing signaling molecules in the brain, along with various other functions (17Trusted Source).
The symptoms of choline deficiency are serious, so fortunately it’s rare.
Whole eggs are an excellent source of choline. A single egg contains more than 100 mg of this very important nutrient.
Eggs are among the best dietary sources of choline, a nutrient that is incredibly important but most people aren’t getting enough of.
5. Are Linked to a Reduced Risk of Heart Disease
LDL cholesterol is generally known as the “bad” cholesterol.
It is well known that having high levels of LDL is linked to an increased risk of heart disease (18Trusted Source, 19Trusted Source).
But many people don’t realize that LDL is divided into subtypes based on the size of the particles.
There are small, dense LDL particles and large LDL particles.
Many studies have shown that people who have predominantly small, dense LDL particles have a higher risk of heart disease than people who have mostly large LDL particles (20, 21Trusted Source, 22Trusted Source).
Even if eggs tend to mildly raise LDL cholesterol in some people, studies show that the particles change from small, dense to large LDL, which is an improvement (23Trusted Source, 24).
Egg consumption appears to change the pattern of LDL particles from small, dense LDL (bad) to large LDL, which is linked to a reduced heart disease risk.
6. Contain Lutein and Zeaxanthin — Antioxidants That Have Major Benefits for Eye Health
One of the consequences of aging is that eyesight tends to get worse.
There are several nutrients that help counteract some of the degenerative processes that can affect our eyes.
Two of these are called lutein and zeaxanthin. They are powerful antioxidants that accumulate in the retina of the eye (25Trusted Source, 26).
Studies show that consuming adequate amounts of these nutrients can significantly reduce the risk of cataracts and macular degeneration, two very common eye disorders (27Trusted Source, 28Trusted Source, 29).
Egg yolks contain large amounts of both lutein and zeaxanthin.
In one controlled study, eating just 1.3 egg yolks per day for 4.5 weeks increased blood levels of lutein by 28–50% and zeaxanthin by 114–142% (30Trusted Source).
Eggs are also high in vitamin A, which deserves another mention here. Vitamin A deficiency is the most common cause of blindness in the world (31).
The antioxidants lutein and zeaxanthin are very important for eye health and can help prevent macular degeneration and cataracts. Eggs are high in both of them.
7. Omega-3 or Pastured Eggs Lower Triglycerides
Not all eggs are created equal. Their nutrient composition varies depending on how the hens were fed and raised.
Eggs from hens that were raised on pasture and/or fed omega-3 enriched feeds tend to be much higher in omega-3 fatty acids.
Omega-3 fatty acids are known to reduce blood levels of triglycerides, a well known risk factor for heart disease (32, 33Trusted Source).
Studies show that consuming omega-3 enriched eggs is a very effective way to lower blood triglycerides. In one study, eating just five omega-3 enriched eggs per week for three weeks reduced triglycerides by 16–18% (34Trusted Source, 35Trusted Source).
Omega-3 enriched and pastured eggs may contain significant amounts of omega-3 fatty acids. Eating these types of eggs is an effective way to reduce blood triglycerides.
8. High in Quality Protein, With All the Essential Amino Acids in the Right Ratios
Proteins are the main building blocks of the human body.
They’re used to make all sorts of tissues and molecules that serve both structural and functional purposes.
Getting enough protein in the diet is very important and studies show that currently recommended amounts may be too low.
Eggs are an excellent source of protein, with a single large egg containing six grams of it.
Eggs also contain all the essential amino acids in the right ratios, so your body is well-equipped to make full use of the protein in them.
Eating enough protein can help with weight loss, increase muscle mass, lower blood pressure and optimize bone health, to name a few (36Trusted Source, 37Trusted Source, 38Trusted Source, 39Trusted Source).
Eggs are fairly high in quality animal protein and contain all the essential amino acids that humans need.
9. Don’t Raise Your Risk of Heart Disease and May Reduce the Risk of Stroke
For many decades, eggs have been unfairly demonized.
It has been claimed that because of the cholesterol in them, they must be bad for the heart.
Many studies published in recent years have examined the relationship between eating eggs and the risk of heart disease.
One review of 17 studies with a total of 263,938 participants found no association between egg intake and heart disease or stroke (40Trusted Source).
Many other studies have arrived at the same conclusion (41, 42Trusted Source).
However, some studies have found that people with diabetes who eat eggs have an increased risk of heart disease (43Trusted Source).
Whether the eggs are actually causing the increased risk isn’t known, because these types of studies can only show statistical association. They cannot prove that eggs caused anything.
It is possible that people who eat lots of eggs and have diabetes are less health-conscious, on average.
On a low-carb diet, which is by far the best diet for people with diabetes, eating eggs leads to improvements in risk factors for heart disease (44Trusted Source, 45Trusted Source).
Many studies have looked at egg intake and the risk of heart disease and found no association. However, some studies have found an increased risk in people with type 2 diabetes.
10. Are Filling and Tend to Make You Eat Fewer Calories, Helping You Lose Weight
Eggs are incredibly filling. They are a high-protein food, and protein is, by far, the most satiating macronutrient (46Trusted Source).
Eggs score high on a scale called the satiety index, which measures the ability of foods to cause feelings of fullness and reduce later calorie intake (47Trusted Source).
In one study of 30 overweight women, eating eggs instead of bagels for breakfast increased feelings of fullness and made them automatically eat fewer calories for the next 36 hours (48Trusted Source).
In another study, replacing a bagel breakfast with an egg breakfast caused significant weight loss over a period of eight weeks (49Trusted Source).
Eggs are highly satiating and may reduce calorie intake later in the day. Regularly eating eggs may promote weight loss.
The Bottom Line
Studies clearly show that eating up to three whole eggs per day is perfectly safe.
There is no evidence that going beyond that is harmful — it is just “uncharted territory,” as it hasn’t been studied.
Eggs are pretty much nature’s perfect food.
On top of everything else, they are also cheap, easy to prepare, go with almost any food and taste awesome.