The delicate balance in the flow of fluids inside and outside of every cell is largely dependent on the ratio of potassium to sodium in those locations. Without enough amounts of both electrolytes, basic cell function would be significantly interrupted, potentially leading to a serious health issue. One example of the importance of the potassiumsodium mechanism of fluid balance is the maintenance of healthy levels of plasma in the bloodstream and tissues. Plasma is responsible for delivering oxygen and nutrients to all tissues, which means proper plasma flow is essential to life. Potassium plays a strong role in the maintenance of healthy blood pressure, in fact its role is so essential that the FDA has approved the following very significant health claim, Diets containing foods that are a good source of potassium and that are low in sodium may reduce the risk of high blood pressure and stroke.