Sodium and potassium are two electrolytes that are required for human survival. Electrolytes are positively and negatively charged particles that control the distribution of fluids throughout the body. They regulate the passage of fluid across cell membranes, which is important for maintaining a state of fluid balance and for transporting nutrients and waste in and out of cells. Sodium is often consumed in excess, which can create an imbalance that can result in high blood pressure. Potassium can aid in the removal of excess sodium from the body, which can help lower blood pressure.