Salt is one of the important substances to the nerves, as it stimulates muscle contraction; this will also help prevent your muscles from cramping. Salt keeps calcium and other minerals in the bloodstream.
It plays a primary role in the processes of digestion and absorption as it activates a special enzyme in the mouth. At this point, the salt allows your taste buds to taste the food.
In the past, people used to take salt from their region to present it as gifts to people of other places.
Imam Ali, peace be upon him, recommended of using salt before eating as it keeps away 70 types of diseases.