Both seawater/salt lake water and animal blood contain large amounts of salt. Put seawater in a flat container and expose it to the sun. After the water evaporates, salt crystals can be obtained. However, the composition of seawater is complex, and some of the substances are harmful to the human body, so do not allow the seawater to evaporate before collecting salt. Because salt crystallizes early, most harmful substances remain in seawater that has not completely evaporated.

The main component of table salt is sodium chloride (NaCl), which is a very simple compound, but the Na particles in it are necessary for the human body.

After sodium ions are consumed by users in food, since sodium ions are small molecular substances, they can freely diffuse into the cell membrane, be absorbed in the small intestine, and enter the tissue cells of the human body through blood circulation and lymph circulation.

Extended information:

Precautions for using edible salt:

1. Do not store: When purchasing salt, do not buy too much at one time. Store it at home because iodine can evaporate and decompose under certain conditions.

2. Avoid high temperatures: When users stir-fry vegetables, please be careful not to add salt, because the consumption rate of salt will be reduced under the influence of high temperatures.

3. Avoid storing salt in an open position: If the salt is exposed to the air for a long time, the iodine will easily evaporate and decompose.

4. Avoid adding vinegar: because vinegar is acidic, and iodine will destroy nutrients when it encounters acidity.

5. Don’t eat too much: Although salt is an indispensable seasoning, eating too much will not only have no benefits, but also have some adverse effects.

Baidu Encyclopedia-Edible Salt

Baidu Encyclopedia-Salt Lake