Potassium/pəˈtæsiəm/ Definition 1 of 1Pro Tip 1/3Diet Necessity Potassium is essential for health, often discussed in dietary contexts. Most dieticians recommend increasing potassium intake for better health. Pro Tip 2/3Electricity Conductor Potassium's role in the body includes helping nerves transmit signals. Potassium helps our nervous system by conducting electricity. Pro Tip 3/3Common Sources Often found in fruits and vegetables, potassium is part of a healthy diet. Oranges, spinach, and potatoes are rich in potassium.