Electrolytes are essential minerals in the body that carry an electric charge. They play a crucial role in various bodily functions, including maintaining fluid balance, transmitting nerve signals, and regulating muscle contractions. Common electrolytes include sodium, potassium, calcium, and chloride. When the balance of electrolytes is disrupted, it can lead to health issues such as dehydration, muscle cramps, and irregular heartbeats. It's important to replenish electrolytes through diet or supplements, especially during intense physical activity or illness. Foods rich in electrolytes include bananas, spinach, and coconut water.