Methods to identify fake duck eggs:

1. The price of fake duck eggs will be lower than that of real duck eggs, and they will be larger in size.

2. There are perforation marks on both ends of the artificial egg shell.

3. The artificial egg will make a sound when shaking. This is because water overflows from the coagulant.

4. The egg yolk and egg white will melt together soon after opening the artificial egg. This is because the egg yolk and egg white are made of the same material.

5. When beating poached eggs, the egg yolk and egg white will become yellowish in the pot.

6. After cooking, the boundary between egg white and egg yolk cannot be distinguished, and there is no whole round egg yolk.

Extended information:

Taboos for eating duck eggs:

1. Middle-aged and elderly people should not eat more and longer. The fat content of duck eggs is higher than the protein content. The cholesterol content of cholesterol is also high, about 1522 mg per 100 grams. Eating too much for middle-aged and elderly people can easily aggravate and accelerate the hardening and aging of the cardiovascular system.

2. People with insufficient spleen yang, diarrhea caused by cold and dampness, and qi stagnation and stuffiness after eating should not eat it; it is not suitable to eat during the period of illness.

3. Patients with nephritis should not eat preserved eggs; patients with cancer should not eat them; people with hypertension, hyperlipidemia, arteriosclerosis and fatty liver should also avoid eating them.

4. Food conflicts: duck eggs should not be eaten with turtles, plums, and mulberries.

Reference: Baidu Encyclopedia-Duck Egg