Eggs should be one of the common foods on the table. They are a good source of protein , and can also supplement lecithin , vitamin A, lutein , choline , etc., which almost contains all the nutrients needed by the human body and are known as "full nutritional food";
is also cheap and has a variety of methods, such as boiled eggs, tea eggs, egg custard , scrambled eggs, egg flower soup... But many people are already wrong when it comes to storing eggs.
01
eggs should be placed in the refrigerator. Should we clean it?
Sometimes the eggs you buy will bring some chicken shit. Do you put them directly in the refrigerator, or do you like to wash them cleanly and then put them in the refrigerator?
In fact, these practices are not suitable for !
There may be bacteria such as Bacillus subtilis, pseudobacteria, Escherichia coli on the eggshell. These bacteria can still grow and reproduce at low temperatures. If placed directly in the refrigerator, it will pollute the refrigerator environment and may cause cross-contamination and affect the safety and hygiene of other foods.
If wash the eggs , although it is clean, will accelerate its deterioration .
There are actually many small holes on the surface of the egg shell, and there is a layer of "protective film" that cannot be seen by the naked eye, which "encloses" these small holes. This "protective film" can not only prevent bacteria from entering the egg, but also prevent the water in the egg from evaporating, keeping the egg liquid fresh and tender. If the eggs are washed in water and the protective film is washed away, bacteria and microorganisms will easily enter the egg, accelerating the egg's spoilage.
Correct storage method :
① Put the eggs in a clean packaging bag , then put on the refrigerator egg rack to save . If you feel that the surface of the egg is too dirty, you can use a dry tissue to wipe it gently.
② The big head is facing up, and the small head is under . The air chamber of the egg is mainly concentrated at one end of the big head. Compared with the small head facing up, the big head facing up can maintain the freshness of the eggs better.
③ The fresh eggs taken from the refrigerator should be eaten as soon as possible by , and should not be stored for a long time or refrigerated again. Because during the process of entering and leaving the refrigerator, there will be a layer of condensed water droplets on the surface of the egg, and the bacteria and microorganisms in it may quickly penetrate the egg shell and penetrate deep into the inner layer of the egg liquid.
④ Do not overstock eggs , the refrigeration time is up to 1 month.
02
Book, stir-fry and fry, which way to eat is healthier?
Boiled eggs, scrambled eggs, fried poached eggs, , etc. are all commonly eaten, so which one is better?
Among many ways, boiled eggs is the most important thing because of the low cooking temperature of and no oil . It has won the top in the "vitamin preservation ranking", "protein best digestion ranking", and "healthy heart-healthy ranking" and other egg eating methods.
But it should be noted that some boiled eggs also have hidden risks:
1. Tea eggs
Tea and eggs are both good foods themselves, but in the process of making tea eggs, tannic acid in the tea will combine with the protein in the eggs, producing tannic acid protein , thereby inhibiting intestinal peristalsis, prolonging the excretion time of feces ;
2. soft-boiled eggs
Many people will make fluffy eggs or soft-boiled eggs when boiling or frying eggs, but this way of eating is actually not recommended .
Generally, eggs may carry Salmonella . If it is not fully cooked during the cooking process, there may be residuals. After eating, may cause diarrhea, vomiting, fever, and other problems. Therefore, if you really like to eat hot spring eggs , soft-boiled eggs, etc., it is recommended to choose sterilized eggs that can be eaten raw.
However, raw eggs are not as nutritious as cooked eggs . There is a substance in raw eggs that is antitrypsin , which will hinder the absorption of protein in eggs; there are also ingredients in the egg whites of raw eggs that hinder the absorption of vitamin B7.
Also remind everyone that eggs are not boiling time, the better , otherwise the egg yolk will turn green - ferrous ion in the egg yolk combines with sulfur ion in the protein to form ferrous sulfide that is difficult to melt, it will not be absorbed by the human body, and it is prone to poor absorption after consumption.
Correct way to boil eggs:
water boils and boils for three minutes, turn off the heat, and simmer in a pot for two minutes. The eggs cooked in this way have the best sterilization effect and have a delicious taste.
03
Domestic eggs and feather eggs are more nutritious?
People also have many different opinions on egg varieties, such as: native eggs are nutritious than ordinary eggs; red-skinned eggs are better than white-skinned eggs; feather eggs are more nutritious...
1. Egg test
Previously, a program tested various eggs on the market. The results showed that:
100 grams of eggs per 100 grams:
① The highest protein content is white-skinned egg;
② The highest fat content is black egg;
③ The highest vitamin A content is DHA egg;
④ cholesterol content is white-skinned egg.
But in general, the ingredients in various eggs are almost the same, and the nutritional content does not increase due to the increase in price.
Experts said that the different varieties of eggs of are actually because different ingredients are added to the chicken feed. After eating them, the chicken will produce eggs of with different flavors and elements. So there is no need to pursue high-priced eggs too much, just choose the one you like.
2.Foat eggs are a good nutritional "big tonic" product?
Many people think that "feather eggs have high nutritional value" because they contain embryos.
. The fact is that during the incubation process, the nutrients such as proteins, fats, trace elements, sugars, inorganic salts and vitamins contained in it have changed, and most of the nutrients have been consumed during embryonic development.
From a health point of view, feather eggs may contain a large number of bacteria , such as E. coli, Staphylococcus, typhoid , Proteobacter , etc. Eating feather eggs not only has low nutritional value , but also prone to food poisoning , causing dysentery , typhoid fever, hepatitis and other diseases.
04
How many eggs can you eat a day?
Like other foods, although eggs are good, you can’t eat too much. According to the 2016 edition of " Dietary Guidelines for Chinese Residents ", if other foods (milk, meat, fish and shrimp) are consumed normally, should not eat more than 7 eggs per week. In other words, in the case of a balanced diet, can eat 1 whole egg every day.
1. People who can eat two
For egg milk vegetarians who do not have other sources of meat cholesterol, the intake of eggs and milk can be appropriately increased.
For blood lipids normal elderly , considering the nutritional value of eggs and the convenience and ease of eating, can eat up to 2 per day under the premise of a healthy diet.
2. People who need to be restricted
Hyperlipid and hypercholesterolemia, especially those who are at the same time at the risk of diabetes or heart failure , should be cautious when eating foods rich in cholesterol. If you already have high cholesterol foods such as fish, shrimp, and meat in your diet, you should limit your egg intake according to actual conditions.
Source: I am the official microsoftware of the great doctor, popular science in China
Editor: Wen Jialin Xu Rumeng
Editor: Chen Guangtai
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