The 24-Hour Urine Magnesium Test measures the amount of magnesium excreted in urine over a full day. Magnesium is an essential mineral that supports nerve function, muscle health, heart rhythm, and bone strength. Abnormal magnesium levels can indicate kidney disorders, metabolic imbalances, or electrolyte disturbances. This test provides healthcare providers with valuable insights into kidney function and electrolyte balance, helping guide treatment and dietary recommendations for maintaining overall wellness.