Magnesium (Serum)

Magnesium (Serum) is a biochemical blood test that measures the concentration of magnesium in the bloodstream. Magnesium is essential for muscle and nerve function, energy production, heart rhythm regulation, and bone health. Abnormal serum magnesium levels may be associated with kidney disease, gastrointestinal disorders, malnutrition, uncontrolled diabetes, or use of certain medications. Low magnesium levels can cause muscle cramps, weakness, tremors, or cardiac arrhythmias, while high levels may lead to nausea, low blood pressure, or slowed reflexes. This test is commonly recommended in patients with electrolyte imbalance, cardiac issues, or chronic medical conditions.