Potassium is a mineral found in foods such as bananas, orange juice and potatoes. Like sodium and chloride, potassium is an electrolyte, meaning it takes on a positive or negative charge when dissolved in fluids. As an electrolyte, potassium supports the proper function of all cells, organs and tissues in the body. It contributes to healthy heart activity as well as skeletal health and smooth muscle contraction, making it crucial for normal muscular and digestive function.* Potassium helps regulate the body's fluid levels.* It's also important for the transmission of nerve impulses, the contraction of muscles and energy production.*