An electrolyte panel is a blood test that measures the levels of essential minerals in the body, known as electrolytes. These include sodium, potassium, chloride, bicarbonate, calcium, and magnesium. Electrolytes play a crucial role in maintaining fluid balance, muscle function, and nerve signaling. Doctors often order an electrolyte panel to assess a patient's hydration status, kidney function, or to diagnose conditions like dehydration or electrolyte imbalances. The results can help guide treatment decisions and monitor the effectiveness of therapies, especially in patients with conditions such as heart disease or kidney disorders.