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Electrolytes

What is Magnesium? Your Complete Guide

Magnesium is involved in over 300 enzymatic reactions — muscle and nerve function, blood sugar control, blood pressure regulation, and bone development. Often called the 'forgotten electrolyte' because deficiency is common but rarely tested.

💡Simply Explained

Magnesium is involved in over 300 chemical reactions in your body — muscle relaxation, nerve function, blood sugar control, and bone building. It's called the "forgotten electrolyte" because deficiency is extremely common but rarely tested.

📏Normal Range

1.7 – 2.2mg/dL

Typical reference range. Your lab may use slightly different values.

LowNormalHigh
< 1.7 mg/dL1.7 – 2.2 mg/dL> 2.2 mg/dL

⬆️What High Magnesium Means

Possible Causes

  • Kidney failure (can't excrete magnesium)
  • Excessive supplementation
  • Antacid overuse (magnesium-containing antacids)
  • Hypothyroidism

Foods That Can Help

  • Reduce magnesium supplements if taking any
  • Avoid magnesium-containing antacids
  • Stay hydrated to help kidneys excrete excess

⬇️What Low Magnesium Means

Possible Causes

  • Poor dietary intake
  • Diabetes (increased urinary magnesium loss)
  • Alcohol use
  • Medications: PPIs (omeprazole, pantoprazole), diuretics
  • Diarrhea or vomiting
  • Stress

Foods That Can Help

  • Dark chocolate (yes, really!)
  • Almonds, cashews, peanuts
  • Pumpkin seeds and sunflower seeds
  • Spinach and leafy greens
  • Bananas and avocados
  • Whole grains and millets

🏃Lifestyle Actions

If Your Magnesium Is High

  • Stop magnesium supplements if taking any
  • Check kidney function
  • Avoid magnesium-containing antacids

If Your Magnesium Is Low

  • Increase magnesium-rich foods
  • If on PPIs (omeprazole, pantoprazole) long-term, discuss magnesium monitoring with doctor
  • Magnesium supplements (glycinate or citrate forms are best absorbed)
  • Reduce stress — chronic stress depletes magnesium

🩺When to See a Doctor

High Magnesium

Very high magnesium (>5 mg/dL) can cause muscle weakness, breathing problems, and cardiac arrest — seek emergency care. Mild elevation — check kidney function.

Low Magnesium

Low magnesium with muscle cramps, tremors, or heart palpitations — see a doctor within 1-2 weeks. Mild deficiency — improve diet.

🎯Did You Know?

Only 1% of your body's magnesium is in the blood — the rest is in bones and cells. This means your blood magnesium can be "normal" while your body is actually depleted! It's one of the trickiest nutrients to accurately measure.

❓Frequently Asked Questions

What is Magnesium?

Magnesium is involved in over 300 chemical reactions in your body — muscle relaxation, nerve function, blood sugar control, and bone building. It's called the "forgotten electrolyte" because deficiency is extremely common but rarely tested.

What is the normal range for Magnesium?

The typical normal range for Magnesium is 1.7–2.2 mg/dL.

What causes high Magnesium?

Kidney failure (can't excrete magnesium). Excessive supplementation. Antacid overuse (magnesium-containing antacids).

What causes low Magnesium?

Poor dietary intake. Diabetes (increased urinary magnesium loss). Alcohol use.

How can I check my Magnesium levels?

You can check your Magnesium levels with a routine blood test. Upload your lab report to ScanHealth for an instant, plain-language explanation.

Check Your Magnesium Results Instantly

Upload your blood test report and get a plain-language explanation of your Magnesium result — plus all other markers. Free.

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This guide is for informational purposes only and does not constitute medical advice. Reference ranges may vary by lab. Always consult a qualified healthcare provider for diagnosis and treatment.