People believe that chick embryo eggs have the effect of invigorating qi, which can make the face rosy, increase appetite, strengthen the body and delay aging. It is said that the protein content of chicken embryo eggs is high. In addition, it contains some ingredients similar to "human placenta", which can improve gastrointestinal function, stimulate appetite and resist aging.

However, most of the chicken embryo eggs sold in the market are eggs used to hatch chickens, which stop developing and die in the eggshell due to improper temperature and humidity or infection with germs. The nutrients such as protein, fat, sugar, inorganic salts and vitamins originally contained in this dead embryo egg have all or partially changed, and most of them have been utilized and consumed by embryos, leaving little nutrients.

According to the determination, almost 111% of dead embryo eggs contain germs, such as Escherichia coli, Staphylococcus, Typhoid Bacillus, Proteus and so on. Eating this stale dead embryo egg is not only of low nutritional value, but also prone to poisoning, causing dysentery, typhoid fever, hepatitis and other diseases.