Why Taste Salt before and after Meals?

Our Holy Prophet (SAW) has said: "One who eats a pinch a salt before and after a thing (food) Allah will protect him from 360 types of hardship, of which the easiest is leprosy".

Imam Baqir (a.s.) has said: "Salt is a cure for 70 diseases and if people will come to know the advantages of salt they will not use any other cure except salt."

1 Taste is a chemical sensation. Salt stimulates the taste buds of the tongue to their maximum, thus increasing secretion. Saliva thus secreted helps in the process of mastication of food, and in the preparing of the food into a bolus, suitable for digestion. Saliva also has a digestive and bacteriolytic action.
2 "Salt stimulates the sensory nerve endings on the tongue. This generates nervous impulses which pass via the central nervous system to trigger the corresponding motor nerve of the gland into action and commence secretion. Thus digestive juices are secreted in stomach and intestines, and the digestive system is prepared to digest and absorb the food which is to follow the initial taste of salt. Similarly, a pinch of salt at the end of a meal completes digestion. In other words indigestion and other related problems can be controlled by practicing this simple dietary advice.
3 Salt plays an important role in phosphorylation. The term phosphorylation includes all chemical reactions in the body which require combination with phosphoric acid. These chemical reactions are an essential part during the absorption and metabolism of different foods. It has been observed that adrenal glands (cortex) in the body control phosphorylation by helping the enzymes responsible for the process. But it is also known that many of the defects seen in diseases of adrenal glands are rectified by giving enough salt.
4 It is interesting to note that water absorption from the intestines is influenced by the presence of salt in it. Pure distilled water is absorbed only upto 59% but if given along with salt, the rate of absorption gradually rises to 95%.
5 Deficiency of salt shows reduction in fat deposits, atrophy of muscles, lung infections, retarded bone growth and reduction in bone tissue.
6 Lastly a word of caution for excess salt taken, which can lead to swelling all over the body especially legs and ankles, high blood pressure, hyper-acidity, stomach ulcers and paralytic strokes.

Therefore, taking a pinch of salt before and after each meal will surely fulfill one's daily requirements.