“Sea Crystal” is a product of seawater and salt chemical industry. It can increase the saltiness of water in water. Recently, some citizens found that many vendors in the fishery area of a market in Nantong dumped “sea crystal” directly into the breeding area. In the water of seafood, everyone can't help but worry about whether this practice is harmful to the human body.

In the morning, the reporter went to a farmer's market in Changqing Road, Nantong Development Zone, and almost all the bags of “sea crystal” were placed next to the stalls selling seafood in the fisheries area.

Reporter: In the bag (what is the sea crystal).

Vendor: Raising crabs and raising shrimps.

Reporter: What kind of sea crystal?

Vendor: Sea crystal used here.

Reporter: This is a sea shrimp.

Vendor: This shrimp should be salty, this freshwater shrimp (not needed).

Vendors say that it is very common to put sea crystals in seafood. By adjusting the salinity of water through sea crystals, seafood can be made fresher and live longer.

Vendor: This is going to be added. This must be added. If you don't add it for a while, you will die.

Reporter: Have you used this all the time?

Vendor: Yes, yes!

The reporter saw that the sea crystal is a light blue powder. Generally, there are different seafood products for different types of packaging. Can be seen on the spot, each time the amount is completely sold by the vendor, we also noticed that the package also stated that "sea crystal" is not a food, do not eat.

Reporter: Is there any harm?

Vendor: No harm, this is industrial salt.

The reporter learned from experts that sea crystal is an industrial salt. Compared with salt, sea crystal has more chemical elements. At present, there is no uniform standard for the production and use of sea crystal in the country, but if it is strictly in accordance with production. The ratio required by the manufacturer to culture seafood is basically harmless to the human body. Once the magnesium in the excess sea crystals will cause damage to the body's nerve conduction system.