The salt/water ratio is critical for the metabolism of our body. Salt facilitates sending signals in our nerves and muscles and helps sustain the fluid content inside and outside the blood cells. The salt concentration in a solution used by the United States Pharmacopeia (USP) to cleanse wounds is same as is present in the human blood i.e. 0.9%(Sodium Chloride. Dietary salt exists in various forms: unrefined salt, refined salt also known as table salt and iodine fortified salt. salt is also used as a food preservative.