Potassium plays a vital role in maintaining fluid balance in the body. It helps regulate intracellular and extracellular fluid levels and is essential for proper cell function. Potassium also assists in muscle contractions and nerve signaling, contributing to overall cardiovascular health. Consuming adequate potassium helps prevent dehydration, especially during exercise when fluid loss occurs. Good dietary sources include bananas, oranges, potatoes, and spinach. Maintaining a proper balance of potassium is crucial for managing blood pressure and supporting general bodily functions.