Potassium Ionic Mineral by Eidon 18 oz Liquid Potassium Ionic Mineral 18 oz Liquid Product Potassium is one of seven macro minerals-inorganic nutrients needed in relatively high daily amounts. Along with chloride sodium magnesium and calcium potassium is an essential electrolyte. They are called electrolytes because they carry an electrical charge when dissolved in body fluids. These elements are distributed throughout the body's fluids including blood lymph and inter-cellular fluids.