Anyone who does even a little sport knows that electrolytes are important for you, but what exactly are these electrolytes? Electrolytes are essential for keeping your body in balance. They do this through substances (usually salts) that dissolve in water. We call these ions. Substances such as Sodium (Na), Potassium (K⁺), Calcium (Ca²⁺), and Chloride (Cl⁻). They are essential because ...