An electrolyte is a substance that, when dissolved in water, dissociates into ions and conducts electricity. Common examples include salts, acids, and bases. Electrolytes are essential for various physiological processes, including maintaining hydration, regulating blood pressure, and facilitating nerve and muscle function. The balance of electrolytes is critical for overall health, as imbalances can lead to serious health issues such as dehydration, muscle cramps, or cardiac problems. Monitoring electrolyte levels is especially important in athletes and patients with certain medical conditions.