Eggs are one of the most common foods in the diet of Chinese residents. There are various opinions about eggs, many of which are not scientific and reasonable. Correcting these common misunderstandings is of great significance for popularizing nutrition knowledge and establishing a scientific outlook on diet.

　　 1. Red shell eggs are more nutritious than white shell eggs

　　 People used to think that red shell eggs were more nutritious, and the price of red shell eggs was also more expensive than white shell eggs. But in fact, the test data shows that the color of the eggshell has nothing to do with nutrition.

　　 2. Farm eggs are more nutritious

　　Farm eggs are also called "soil eggs", "stupid eggs" or "grass eggs". It is generally believed that farm eggs are more nutritious, but what is the actual situation?

　　 First of all, the feeds for chickens in chicken farms are scientifically matched, and the nutrient content is comprehensive and balanced, so In the produced eggs ("foreign eggs"), the content of mineral elements such as iron, calcium, and magnesium are higher than that of farm eggs. This is supported by test data.

Secondly, a certain amount of dietary fiber is added to the feed that pheasants eat, which makes the cholesterol and fat content of egg yolks much lower than that of farm eggs, which is more suitable for the elderly. Farm chickens lay few eggs and have a long nutrient accumulation cycle, so the fat content of the laid eggs is high. Of course, farm eggs also have advantages, good taste, pure taste, and they contain more omega-3 fatty acids and phospholipids. These two substances can promote cholesterol metabolism and are very good for cardiovascular protection.

　　It can be seen that the nutritional value of farm eggs and "foreign eggs" are different. One-sided emphasis on the goodness of farm eggs is easy to provide convenience for counterfeiters. The real identity of many so-called farm eggs is very suspicious, and it is difficult for consumers to identify themselves from the appearance alone. Neither the color of the eggshell nor the color of the egg yolk can be used as a criterion for judging, because it is easy to counterfeit. The "Sudan Red Event" is a typical example (consumers prefer red hearts, and illegal producers use industrial dye Sudan red to dye) .

In summary, from the nutritional value of eggs, we should be concerned about what the chicken eats, whether the chicken’s living condition is healthy, whether there are environmental pollution and other issues. Is it the farmer’s stupid egg instead? It''s not that important. Consumers want farm eggs because they believe that the eggs they eat are safe, but if these eggs are originally prepared for sale, there will not be an essential difference from the chicken farm eggs, even because farmers raise chickens. Unlike being supervised like a large-scale farm, there is no guarantee of safety.

　　3. The better the egg yolk, the better the nutrition

　　The color of the egg yolk is related to the various pigments it contains, mainly from vitamin B2, carotene, lutein, etc. It is indeed nutritious Value, so under natural conditions, the egg yolk is darker in color, and the nutritional value is likely to be higher. However, the existing "technology" can easily make the egg yolk color deeper, and has nothing to do with nutrition. The lesson of "Red Heart Duck Egg" (Sudan Red Illegal in Feed) should be fully learned.

　　 4. Maternal or pregnant women should eat more eggs

　　In many regions, there is the ancient custom of maternal eating large amounts of eggs. However, this custom deviates from the basic principle of balanced diet and does not comply with the recommendations of the "Dietary Guidelines for Chinese Residents 2007". In the case of sufficient supply of meat, fish, shrimp, milk, soy products, etc., it is more appropriate for a woman to give an egg a day. Only when there are few other animal foods can you increase the egg intake as appropriate.

　　The situation of pregnant women is similar to that of parturients. The suggestion that pregnant women "should eat 4 eggs a day, not more than 7 at most" makes little sense.

　　 5. "Newborn eggs" are more nutritious

　　 The so-called "newborn eggs" (also called "open eggs") are not just the first eggs laid by a chicken , But eggs laid in one stage. Generally, the eggs produced by chickens within the period of 130 days to 160 days should be called newborn eggs. The eggs are smaller at this time, about 40 grams. This kind of egg is not allowed to be sold abroad because the weight is not standard. It is only when the hen is about 30 weeks old and the egg weighs 60 to 65 grams that the sales standard is reached. There is no significant difference in nutritional value between newborn eggs and eggs laid after 30 weeks of age, except for weight.