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I feel like I bought fake eggs today.
There really are fake eggs The eggshell of fake eggs is caused by calcium carbonate, paraffin and gypsum powder. Egg white and egg white are mainly caused by sodium alginate, plus alum, gelatin and coloring.

How to recognize artificial eggs 1, "artificial eggs" eggshell perforated traces at both ends. 2, in the shaking of the "artificial egg" will have a ringing sound, which is due to the moisture from the coagulant overflow. 3, "artificial eggs" soon after opening the yolk, egg white will melt together, this is because the yolk and egg white is made of homogeneous raw materials; 4, playing eggs, egg yolks, egg whites in the pot will be scattered yellow. Fake eggs eggshell color than the real eggshell a little brighter, but not too obvious. Touching the shell of a fake egg with your hand, you will feel it is a bit rougher than a real egg

Because the production cost of fake eggs is only about 25% of the selling price[4], they can be considered to be banned in the mainland. They have been found in Beijing, Shandong, Guangdong and other places. Fake eggs not only have no nutritional value, but also have serious consequences such as memory loss and dementia when consumed over a long period of time (probably due to the aluminum content of alum).