People who don’t eat salt will indeed die, or at least suffer from stunted development, which will affect their intelligence level. This is because every cell in our body requires inorganic salts to maintain appropriate osmotic pressure and appropriate sodium and potassium ion concentrations. When there is less salt in the blood vessels, it cannot absorb water, and the water flows into the tissue fluid - this is called edema; when there is less salt in the cells, the cell fluid will also decrease, and the cells will become shriveled; brain cells The amount of sodium ions and chloride ions in the body is too low, causing the electrical signals to not be transmitted normally, and you will become stupid, and the nerve signals cannot be transmitted normally, the muscles will twitch, and they will respond incorrectly to sensory signals; there is less salt in the cells. , and all other nutrients cannot be brought into the intestines by the blood for absorption...then the hair turns white. There is a musical called "The White-Haired Girl", in which the heroine ages prematurely because she has no salt to eat.

Animals also need salt and eat salt, but animals do not have processed salt to ingest like people do. They usually ingest salt through other methods, so without people knowing it, The animals already get enough salt on their own. For example, herbivores such as cattle and sheep will lick salt crystals on the surface of rocks or soil to obtain salt; canines will lick each other's urine to replenish salt; carnivores can also hunt other animals and drink them blood to obtain salt. Elephants and parrots generally obtain salt by eating soil clods and particles. Other animals also have their own ways of obtaining salt.

So, not only humans need salt, but other animals also need it.