The eggshell of artificial egg is mainly made of calcium carbonate and other raw materials added into the mold for molding; Egg white is made by adding sodium alginate into water to form a solution, and then continuously stirring; The main component of egg yolk is also sodium alginate solution, which is made by adding pigments such as lemon yellow, putting it into a mold, and then putting it into calcium chloride solution for solidification. The production cost of artificial eggs is only about 25% of the selling price, so it has been repeatedly banned. Found in Beijing, Shandong, Guangdong and other places. Artificial eggs not only have no nutritional value, long-term consumption will lead to memory loss, dementia and other serious consequences. Artificial eggs are similar in appearance, color and weight to real eggs, but they don't have the fishy smell that eggs should have. After the artificial egg is cooked, the yolk can not be crushed and is very elastic. Ordinary consumers can distinguish the authenticity of eggs by the following methods: artificial egg shells are brighter, and real egg shells are rougher; Because water will overflow from the coagulant, there will be noise when shaking; No smell of real eggs; Fake egg's voice is dull when knocking; After opening, the egg yolk and egg white will blend together; When poached eggs are beaten, the yolk and egg white will turn yellow in the pot.