Magnesium
Magnesium explained
Magnesium is a routine blood test that measures serum magnesium levels to help evaluate metabolic health and potential disorders.
Varies by laboratory (LDT/CLIA; not FDA‑approved as a drug)Magnesium helps treat
• Electrolyte balance
• Muscle/nerve function
• Arrhythmia or seizure workups
additional medications
• Related clinical evaluation and history
• Repeat testing to confirm abnormal results
• Additional targeted labs as recommended
medication risks
• False positives/negatives leading to unnecessary anxiety or missed diagnoses
• Privacy and insurance implications depending on results
• Pre‑analytical variables (fasting, meds) can affect accuracy
side effects
• Bruising or soreness at draw site
• Lightheadedness or fainting (rare)
• Infection at puncture site (very rare)
FAQs
Q: Do I need to fast?A: Follow your lab’s instructions; many chemistry tests are best after 8–12 hours fasting.
Q: What can affect results?
A: Medications, hydration, and recent diet can influence values.
Q: How often should I test?
A: Based on your clinician’s plan and risk factors.
Q: Is a single abnormal result diagnostic?
A: No—results are interpreted with history, exam, and possibly repeat testing.
Q: Where is this test done?
A: At CLIA‑certified labs or hospital laboratories.
