According to popular science in China, eggs should be one of the common foods on everyone's table. It is a good source of protein , and can also supplement lecithin , vitamin A, lutein , choline , etc., which contains almost all the nutrients needed by the human body and is known as "full nutritional food".
and the price is cheap and the methods are varied, such as boiled eggs, tea eggs, egg custard , scrambled eggs, egg flower soup... But many people are already wrong about egg storage.
01 eggs should be placed in the refrigerator. Should we clean them?
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 methods are not suitable!
There may be bacteria such as Bacillus subtilis, Pseudopogonis, Escherichia coli on the egg shell. 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 the egg is washed, although it is clean, it 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 you bought in a clean packaging bag and then put them on the refrigerator egg rack to store. If you feel that the surface of the egg is too dirty, you can use a dry tissue to wipe it gently.
②The big head is facing up and the small head is underneath. 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 Fresh eggs taken from the refrigerator should be eaten as soon as possible 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.
④Don’t overstock eggs, the refrigeration time is up to 1 month.
02, which way to eat it is healthier?
Boiled eggs, scrambled eggs, fried poached eggs, , etc. are all commonly eaten, so which one is better?
Among many methods, boiled eggs are kept to the maximum extent due to their low cooking temperature and no oil, and have won the first place in the egg eating methods such as "vitamin preservation ranking", "protein best digestion ranking", and "healthy heart-healthy ranking".
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 bind to the protein in the eggs, producing tannic acid protein, thereby inhibiting intestinal peristalsis and prolonging the excretion time of feces.
2. Soft-Boiled Egg
Many people will make them into 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 they are not cooked well during the cooking process, there may be residuals, which may cause diarrhea, vomiting, fever and other problems after eating. 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 called antitrypsin in raw eggs, 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 reminds everyone that eggs are not cooked as much as possible, otherwise the egg yolk will turn green - the ferrous ion in the egg yolk combines with the sulfur ion in the protein to form the difficult-to-melt ferrous sulphide . It will not be absorbed by the human body and 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, and 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:
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 The highest cholesterol egg is white-skinned egg. However, in general, the ingredients in various eggs are similar, and the nutritional content does not increase due to the increase in price.
Experts said that different varieties of eggs are actually because different ingredients are added to the chicken feed, and eggs with different flavors and elements will be produced after eating them. So there is no need to pursue high-priced eggs too much, just choose the one you like.
2. Is feather egg 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 perspective, 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, do not eat more than 7 eggs per week. In other words, generally adults can eat 1 whole egg every day under a balanced diet.
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 the elderly with normal blood lipids , considering the nutritional value of eggs and their convenience and ease of eating, you can eat up to 2 per day under the premise of a healthy diet.
2. People with more restrictions need to be
hyperlipidemia and hypercholesterolemia, especially those with 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.
