Fake egg is artificial. From the appearance, the color of fake egg eggshell is brighter than that of real eggs, but it is not obvious. Look from the handle, the shell of fake egg is rougher than the shell of a real egg, and there will be noise when shaking, which is because water overflows from the coagulant; From the taste point of view, if you smell it carefully, real eggs will have a faint smell, but fake egg does not; After the fake egg is opened, the egg yolk and egg white will be melted together quickly, because both of them use the same raw material, and fake egg is particularly prone to yellowing. Eggshells in fake egg are made of calcium carbonate mixed with gypsum, and egg yolk and protein are made of sodium alginate, alum, gelatin, edible calcium chloride with water, lemon yellow pigment, etc. Long-term or excessive consumption is harmful to human health.