Potassium Potassium is an element represented by the symbol “K” on the periodic table. Technically considered an alkali metal, potassium has very similar chemical properties to sodium. However, they have very different effects in the human body. Understanding the physiological role of potassium can motivate you to get enough of this beneficial nutrient in your diet. What Is Potassium? Potassium is a dietary mineral that acts as an electrolyte in the body. Electrolytes dissociate…"Potassium"