The primary function of electrolytes in the body is to regulate fluid balance, nerve function, and muscle contractions. Key electrolytes include sodium, potassium, and calcium, which are essential for various physiological processes. Maintaining adequate electrolyte levels is crucial, especially during intense physical activity or in hot environments, as sweat loss can lead to imbalances that negatively affect performance and health. These ions also play a vital role in maintaining the body's pH balance, supporting numerous biochemical reactions critical for sustaining life.