Sodium Biological Role

Sodium is important in the body, as it helps maintain body fluid homeostasis.  People with disorders that do not have enough sodium in the body can take medication such as serum sodium in order to maintain a healthy amount of sodium in the body.  Sodium is also crucial in osmotic pressure, as the body adjusts to when there is too little or too much sodium in the body.  Sodium is also the main cation in outside cells containing fluid in mammalian bodies, and very little sodium inside the cells, consisting of approximately 90% of the body's total sodium content.