1, it may be caused by a large number of bacteria called "Pseudomonas fluorescens" on pork. This kind of bacteria will produce green pigment during reproduction, so pork will turn green. However, this kind of bacteria is ubiquitous in the air, not terrible, and not pathogenic to normal people. As long as pork itself is not spoiled, it can be killed by cooking.

2. The copper ion in the feed fed by some farmers exceeds the standard, and the copper ion will remain in the body after the pigs eat it, so that the cooked meat emits green light.

3. During the cooking process of lean meat (muscle), due to water loss and partial fat precipitation, the fat is distributed inside and on the surface of muscle fiber. When the light is irradiated, the fat absorbs the light in different directions and presents different color changes after reflection. This phenomenon is called "thin film interference" in physics.

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What kind of pork can't be bought?

1, do not buy pork from unknown sources.

Pork of unknown origin is usually not inspected by relevant departments, and there are likely to be diseases, parasites, dead pigs and so on. There will be a red or purple certificate of conformity and inspection certificate on the surface of the inspected pork. If it is not available, it is not suitable to buy it, and it will arouse vigilance.

2. Pork with too much lean meat

In the era of food shortage, fat meat is more popular. But today, buying pork pays more attention to lean meat, but if the fat layer is too thin and lean meat is too much, then be careful to use lean meat to feed pork.

3. Inelastic pork should not be bought.

Pork that has been injected with water or frozen for a long time is damaged, resulting in loss of elasticity. In addition, the fat in this kind of pork will gradually decompose and lose, and the taste will decrease.

4. Pork that feels sticky

Animal meat will be sticky on the surface due to the decomposition and metabolism of bacteria in the process of deterioration. The fresher the pork is, the surface is wet, but it is not sticky, it feels greasy, and even there will be grease on the hands.

Phoenix. com-Wenzhou woman burned a large pot of pork and found that the surface was glowing green.

Phoenix Net-Don't buy these kinds of pork! Teach you a few tricks to choose healthy pork!