Sodium is essential to our body's well being, as long as we have the right amount. Without it, our bodies wouldn't be able to keep the right balance of fluids, which would affect our blood pressure, blood volume and electrolyte levels. Sodium also helps our muscles and nerves function properly. What our bodies don't use, we get rid of through our sweat and urine.
A diet without enough sodium could lead to diarrhea and fluid loss, and, in severe cases, it may lead to seizures, coma or brain damage. And a diet with too much sodium can cause thirst and, in severe instances, it can lead to seizure, coma, brain damage and death. For people with increased risk of developing high blood pressure, or who are living with high blood pressure, a diet high in sodium can increase the risk of developing heart disease and kidney damage or suffering a stroke.