THEto World Egg Day is celebrated every year on second Friday of Octoberwith the aim of enhancing a simple but extraordinary food. Promoted byInternational Egg Commissionthis day invites us to rediscover the egg as an ally for health and to overcome the false myths that have limited its consumption for years.
The egg is a concentrate of nutrients: it contains high quality proteins, essential vitamins, “good” fats and antioxidants that contribute to general well-being. Here are the recent scientific studies that have re-evaluated its role, highlighting how balanced consumption can be an integral part of a healthy diet.
The nutritional benefits of the egg
Eggs are a source of proteins with high biological valuecontaining all the essential amino acids. A review published on Frontiers in Nutrition (PMC9316657) emphasizes that regular consumption of eggs can contribute to the maintenance of muscle mass and counteract sarcopenia, especially in the elderly.
The yolk also contains key nutrients such as vitamin A, D, E, B12 And cholineimportant for brain and liver health, as well as lutein and zeaxanthinantioxidants that protect the retina from oxidative damage (Harvard TH Chan School of Public Health).
However, their effect on lipid metabolism is the subject of ongoing research. A meta-analysis of randomized clinical trials (PMC7400894) showed that egg intake can increase LDL and HDL cholesterol, but does not significantly modify the LDL/HDL ratio, a parameter more indicative of cardiovascular risk.
Cholesterol and cardiovascular health
For decades, eggs have been associated with high cholesterol and heart disease. Current evidence shows a more nuanced picture. According to a review published on Nutrients and data from American Heart Association (Circulation, 2021)The dietary cholesterol exerts a variable effect on plasma levels, influenced by individual genetic and metabolic factors. Some subjects, called “hyper-absorbers”, react more sensitively to the introduction of dietary cholesterol (PubMed 34801688).
An “umbrella review” published on Nutrition, Metabolism and Cardiovascular Diseases (PubMed 39934049) concluded that there is insufficient evidence to discourage egg consumption in the general population, but that the overall quality of the diet remains decisive.
In summary, in healthy subjects the effect of the egg on cardiovascular risk appears neutral, while in the presence of diabetes or familial hypercholesterolemia, intake must be carefully monitored.
False myths to dispel
- The first myth to correct is that “eggs are bad for your heart”. The US nutritional guidelines (Dietary Guidelines for Americans2015–2020) no longer set a hard limit on dietary cholesterol, recognizing that the direct relationship with plasma cholesterol is less significant than thought in the 1970s.
- Another widespread misconception concerns the yolk. It is true that it contains cholesterol, but it is also the part richest in micronutrients and antioxidants. By eliminating it, you give up much of the nutritional value of the egg (Harvard TH Chan School of Public Health).
- Finally, the idea that “eggs make you fat” is contradicted by the evidence. A systematic review published in Systematic Reviews Journal (2023) highlighted that, in the short term, egg intake has no negative effects on body weight or body composition. In the long term, the effects depend on the type of overall diet and individual health status.
Who should consume it with caution
Eggs can be part of a balanced diet in most cases, but there is no universal “safe” threshold. Evidence indicates that moderate consumption, included in a balanced diet, does not pose health risks in healthy populations (PubMed 39934049).
In subjects with dyslipidemia, diabetes or cardiovascular diseasesthe metabolic response may be different. A meta-analysis published in Circulation (AHA, 2021) observed a slight increase in cardiovascular risk with high consumption, particularly in diabetic subjects. In these cases, consumption should be personalized under medical supervision.
Cooking and storage: in the fridge or outside?
The Ministry of Health recommends Always cook eggs completely to avoid infections from Salmonella enteritidisand of keep them in the refrigerator, avoiding cracked shells. THE’egg allergy however, it remains one of the most common in pediatric age and requires complete exclusion.
Some curiosities about the egg
The color of the shell, white or brown, does not affect the nutritional value, but depends on the breed of the hen. The More orange yolk signals a diet richer in natural carotenoids.
According to FAO data, more than that are produced every year in the world 80 million tons of eggsand in Italy the average consumption is approximately 200 eggs per person. In recent years, the demand for organic and free-range eggs has grown steadily, in line with greater sensitivity towards sustainability and animal welfare.
In cultures around the world, the egg has always represented life, rebirth and natural perfectionsymbols that today find renewed coherence with the principles of conscious nutrition.
Balance and awareness
Current scientific evidence shows that the moderate consumption of eggs is compatible with a healthy and balanced eating style. There is no solid evidence to demonize this food, nor to consider it “miraculous”. The actual effect depends on dietary contextfrom the individual metabolic profile and overall lifestyle.
As summarized by Harvard TH Chan School of Public Health“it is not the egg itself that determines health, but the quality of the entire diet”.