Even though our body has a very heavy percentage of water in it, it is not pure water. It is actually a salt solution! Scientists explain this by a theory that all land animals, man included, arose and lived in the sea at a particular period of evolution. When they moved to dry land, they retained 'Sea Water' as their body fluid.
The body loses a quantity of fluid, and along with with it some salt. This loss has to be replaced for health. Our plant food doesn't replace it. Eskimos eat meat most, and they don't require much salt for replacement.
Salt which is sodium chloride is essential for life. When it is deficient, the blood volume and pressure fall resulting in muscular cramps, dizziness and fainting, and sometimes confusion. This is why a salt-free diet is prescribed for certain people. Salt is used medicinally in several ways too. For these simple reasons, salt's importance is prescribed in various ancient scripture and by health scholars.
Salt is chiefly eliminated by kidneys through urine. Normally there is a comfortable excess of salt in the body. But due to a good deal of sweating an excessive amount may be lost, as in the case of people working in deep mines. It is sensible to take appropriately, excess salt to avoid physical problems.
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