What is the normal serum magnesium range?

What is the normal serum magnesium range?

• A. 1.0-1.5 mg/dL
• B. 1.5-2.5 mg/dL
• C. 2.0-3.0 mg/dL
• D. 1.8-2.7 mg/dL

Answer: (B)

Normal serum magnesium is about 1.5 to 2.5 mg/dL. Magnesium is essential for nerve and muscle function and for proper cardiac conduction, so staying within this range supports normal neuromuscular and cardiovascular activity. If levels drop below this range, you can see symptoms like muscle cramps, tremors, arrhythmias, or changes in deep tendon reflexes; it often occurs with poor intake, alcoholism, GI losses, or certain diuretics. If levels rise above this range, it can lead to hypotension, bradycardia, depressed reflexes, and in severe cases respiratory depression, especially in kidney dysfunction or with excessive magnesium intake. The 1.5–2.5 mg/dL range is the commonly cited normal reference, making it the best choice for describing a normal level.

Normal serum magnesium is about 1.5 to 2.5 mg/dL. Magnesium is essential for nerve and muscle function and for proper cardiac conduction, so staying within this range supports normal neuromuscular and cardiovascular activity. If levels drop below this range, you can see symptoms like muscle cramps, tremors, arrhythmias, or changes in deep tendon reflexes; it often occurs with poor intake, alcoholism, GI losses, or certain diuretics. If levels rise above this range, it can lead to hypotension, bradycardia, depressed reflexes, and in severe cases respiratory depression, especially in kidney dysfunction or with excessive magnesium intake. The 1.5–2.5 mg/dL range is the commonly cited normal reference, making it the best choice for describing a normal level.