For years, the eggs They have been the center of constant controversy: they have been blamed for firing the cholesterol and to increase the risk of Cardiovascular diseaseto the point that many people stopped consuming egg yolks out of fear. Today, available research paints a very different picture and forces us to qualify many of those old warnings.
The most recent studies agree that dietary cholesterol, including that of the yolk, has a limited effect on the blood cholesterol levels in the general population. What really matters is the saturated fatthe overall dietary pattern and factors such as genetics or lifestyle. Even so, experts insist on something key: the egg is not a license to eat without restraint, but a food that can fit well into a balanced diet if consumed sensibly.
What we know today about eggs, cholesterol and the heart
These works combine clinical trials y cohort studies with hundreds of thousands of people followed for years. Overall, they indicate that the impact of the egg depends on the dietary contextIt's very different to take it as part of a diet loaded with saturated fats and ultra-processed foods that integrate it into a pattern rich in vegetables, legumes, whole grains and healthy fats.
Along these same lines, the United States dietary guidelines They eliminated the old cap years ago. 300 mg of cholesterol per dayThe advisory committees concluded that there is no solid evidence to support a strict numerical limit for dietary cholesterol and focused instead on reducing the total saturated fat of feeding.
Experts in preventive medicine remind us that most of the cholesterol circulating in the blood the factory liver starting from the organism's own precursors, and that among a 60% and an 80% the levels depend on the Genetic heritageTherefore, simply eating eggs does not, in itself, explain a high cholesterol.
In clinical practice, societies such as the American Heart Association They say that a healthy adult can take, as part of a proper diet, up to one or two eggs a dayprovided the rest of the diet is not high in saturated fats. In people with high cholesterol or a family history of high cholesterol, it is generally recommended to... reduce the number of egg yolks per weekwithout completely banning eggs.
The real problem: saturated fat and diet pattern
Most specialists agree that the main dietary driver that raises the LDL cholesterol (the so-called "bad" cholesterol) is not the cholesterol we eat, but the saturated fatThis type of fat, abundant in butter, processed meats, fatty cheeses, and whole dairy productsIt makes it difficult for the liver to eliminate excess cholesterol, causing it to accumulate in the blood.
For this reason, many guides recommend that the saturated fat do not exceed approximately 10% of daily calorieswhich in an average adult is equivalent to about 20 grams per dayTo reach that figure, the effort must focus on moderate your intake of foods high in saturated fatsrather than demonizing specific products like eggs.
The way eggs are eaten greatly influences their cardiometabolic profile. It's not the same as... boiled or poached egg accompanied by vegetables and wholemeal bread, plus a fried egg with sausages and lardSeveral cardiologists insist that the risk is not usually in the isolated egg, but in the full plate and in the rest of the daily routine.
In people with risk factors—such as diabetes, high cholesterol, or a history of heart attack— many specialists opt for a conservative stance: keeping the egg, but generally around three or four units a weekprioritizing simple cooking methods and avoiding accompanying it with fatty products.
Lessons from international studies and the Japanese case
Large comparative studies between countries have provided an interesting perspective on the relationship between Eggs and cardiovascular healthAnalyses that include data from more than a hundred nations and populations with very different habits suggest that moderate consumption This food does not result in more heart attacks or higher cardiovascular mortality.
One of the most striking examples is that of JapanThere, the average egg consumption is approximately double the world averageAnd yet the country maintains some of the lower rates of ischemic heart disease of the planet. Researchers do not interpret this as direct proof that eggs protect the heart, but rather as a sign that their high consumption does not necessarily imply more risk.
In the Japanese context, eggs are often integrated into diets rich in fish, rice, vegetables and unsaturated fatsvery different from Western patterns laden with ultra-processed foods. Studies conducted on the Japanese population show that frequency of arterial obstruction There is no significant difference between those who eat few eggs and those who eat them daily, provided the rest of the diet is balanced.
In some specific subgroups, such as people not receiving treatment with cholesterol-lowering drugsIt has even been observed that moderate consumption is associated with lower incidence of multivessel arterial diseaseAlthough these signs are interesting, the authors themselves urge caution, because many other factors such as genetics and lifestyle also play a role.
The message that the research teams are taking away is that the global dietary patterns and life habits They weigh more than a single food. In populations that maintain an active lifestyle, consume little ultra-processed food, and have an abundance of plant-based products, eggs fit in without increasing the risk of heart disease.
How do eggs really affect cholesterol?
Traditional distrust of eggs stems from their cholesterol contentconcentrated mainly in the yolk. Recent reviews indicate that, for every egg consumed, total cholesterol and LDL can increase by around 2% or 3%, a relatively small variation.
Furthermore, this rise is usually accompanied by a similar increase in HDL cholesterolThe so-called "good" cholesterol, responsible for transporting excess cholesterol back to the liver. When both rise in similar proportions, the relationship between beneficial and harmful cholesterol It tends to remain fairly stable.
The body also plays its part: when it receives more cholesterol from food, the liver tends to reduce their own internal productionThis self-regulating mechanism helps to ensure that the overall impact on blood is not as pronounced as was thought decades ago.
On the other hand, it has been observed that the egg white protein can limit intestinal absorption of cholesterolEspecially when it's part of a high-fiber, nutritionally balanced diet. This combination means that, within a healthy eating pattern, eggs don't pose a significant threat to the arteries.
However, not everyone responds the same way. In individuals with a genetic predisposition In certain cases, dietary cholesterol can have a greater influence on blood cholesterol levels. That's why specialists emphasize the importance of periodically monitor the lipid profile and adjust egg consumption recommendations on an individual basis.
The yolk: from suspect to key ingredient due to its nutrients
For years, many consumers have chosen to discard the yolk to "avoid cholesterol," keeping only the white. However, nutritionists remind us that most of the nutrients in the egg They focus precisely on that yellow part that so many people discard.
In contrast to the clear one, which contributes above all proteinThe yolk offers a combination of vitamins and minerals that is difficult to find in other commonly consumed foods. A large egg can provide around three grams of proteinphosphorus, potassium and selenium, as well as vitamins A, D, E and Kfolate and hill.
La vitamin D and hill These are two nutrients that are lacking in many modern dietary patterns. The first is associated with bone, immune, and muscle function, while choline plays an important role in the brain and liver healthSeveral experts point out that there are not many common foods that provide significant amounts of these compounds in such a concentrated form.
The yolk is also a notable source of lutein and zeaxanthin, antioxidants primarily related to the protection of eye health and with the prevention of LDL cholesterol oxidationBy preventing this cholesterol from oxidizing, one of the key steps in the formation of atheromatous plaques in the arteries is hindered.
Systematically omitting the yolk, especially in people without a clear medical indication, implies lose a good part of the nutritional value from the egg. Many cardiologists and dietitians agree that it makes more sense to control the overall diet and the total amount of saturated fats than to focus solely on eliminating the yolk.
How many eggs can you eat and in what cases should you limit your intake?
Recommendations for egg consumption have been softened, but they still distinguish between healthy people and those who have increased cardiovascular riskIn adults without relevant pathologies and with good habits, several specialists consider an approximate consumption of one egg a day within a varied diet.
In contrast, in people with high cholesterol, diabetes, or a history of coronary artery diseaseMany cardiologists prefer to operate within a more cautious range, around three or four eggs a weekThe idea is not to prohibit them, but to ensure that they do not add to other risk factors that are already present.
In the case of those who have a intense family history of hypercholesterolemia or have already suffered a cardiovascular event, some specialists even recommend a maximum of four to six egg yolks per weekcombining the remaining egg whites with other sources of lean protein.
There are also experts who point out, based on specific studies, that even two or three eggs daily They might not pose a problem in very active people without risk factors and with high-quality diets. However, this position remains controversial And the researchers themselves are calling for more long-term data, so the dominant message continues to be that moderation.
In any case, beyond the exact number of eggs, professionals insist on monitoring the individual lipid profileBlood pressure, weight, and overall diet quality all play a role. The same intake may be perfectly acceptable for one person and excessive for another with a much higher baseline risk.
How to incorporate eggs into a heart-healthy diet
The current consensus is not so much whether eggs are "good" or "bad," but how They are eaten. Preparations such as the hard-boiled egg, soft-boiled egg, poached egg, or egg in an omelet with vegetables They fit well into patterns considered cardioprotective, such as the Mediterranean diet.
In contrast, repeated consumption of fried eggs accompanied by bacon, chorizo ​​or lard It increases the presence of [unclear] on the plate, which can tip the balance towards a higher cardiometabolic risk, especially if added to other unhealthy habits.
To mitigate the potential effect of dietary cholesterol, it is helpful to combine eggs with high fiber foodssuch as whole-wheat bread, legumes, vegetables, or fruit. Fiber helps to reduce cholesterol reabsorption in the intestine and contributes to improving the overall cardiovascular profile.
In everyday cooking, many experts recommend prioritizing vegetable oilssuch as olive oil, compared to solid fats of animal origin. Using small amounts of oil, preferring techniques like boiling, baking, or gentle sautéing, and avoiding frequent breading helps make egg dishes much lighter from a lipid perspective.
Beyond specific recipes, it is emphasized that the egg should be part of a globally varied diet, featuring fresh vegetable products, fish, nuts and whole grains, and with limited consumption of ultra-processed foods, sugary drinks and red meat.
With the available evidence, the image of the egg has changed a lot compared to past decades: from a food practically banned by people concerned about the cholesterol, has come to be considered a product nutritious, affordable and compatible Eggs contribute to good cardiovascular health when consumed in moderation as part of a balanced diet. The key is no longer to demonize specific foods, but to consider the overall diet and lifestyle, adjusting portions to each person's individual circumstances and relying on regular medical checkups to determine the optimal number of eggs for each individual.
