Nowadays, when people buy eggs, some only choose those containing trace elements and no longer eat regular eggs, believing that "you are what you eat" and that eggs with trace elements are beneficial to health. However, nutrition experts say that "nutritional eggs" should not be consumed indiscriminately.
So-called "nutritional eggs" are produced by feeding chickens special feed containing trace elements like iodine, zinc, and iron. After about two months of consuming this feed, a biological transformation occurs within the chicken's body, resulting in eggs that are different from regular eggs. Nutritional eggs are only suitable for a small portion of the population and should not be eaten casually. The three most easily deficient trace elements in the human body are calcium, iron, and iodine. However, a person's daily diet has fixed requirements for these elements. A normal person can fully meet their daily needs by eating just one or two regular eggs. Consuming excessive amounts of trace elements can be harmful to the body. For example, too much iodine can lead to a series of nervous system symptoms; an increase in chromium levels in the body can also easily lead to chromium poisoning.
Additionally, while eggs are delicious and nutritious, fresh eggs that appear clean and have intact shells are not actually clean. First, the cloaca, through which a chicken lays an egg, is also the channel for excreting feces. Second, before eggs reach your home, they undergo a series of processing and transportation processes during which they can be contaminated by various pollutants. Furthermore, an eggshell that appears intact is not completely whole; it is covered with tiny pores invisible to the naked eye. These pores serve as channels for gas exchange between the living egg and the outside world. As the egg is laid, it can be contaminated by various bacteria and viruses through these small holes.
Scientists have found that Salmonella, which can cause bacterial food poisoning and bacterial dysentery, can be detected on both the eggshell and inside the egg.
Even more concerning is that the internal organs of many poultry, especially chickens and ducks, are habitats for Salmonella. From the very beginning of an egg's development, bacteria can get a head start, occupying and潜伏 (lànqiú -潜伏) inside the egg, causing "congenital" contamination.
Therefore, before eating eggs, you must wash the outside of the egg thoroughly before cooking. Also, do not eat raw eggs. Not only is the nutrition in raw eggs not easily absorbed, but they also pose significant health hazards.