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Doctor's Assessment Included

Every result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP.

Minerals

Magnesium (Intracellular)

Intracellular magnesium provides a true picture of magnesium availability for muscle contraction, energy production, and recovery — essential data for optimising performance.

What It Measures

This test measures the concentration of magnesium inside red blood cells or other cell types, reflecting the functional magnesium available for cellular processes.

Why It Matters

Standard serum magnesium tests may appear normal even when intracellular levels are depleted. This test can reveal hidden deficiencies that affect energy production, muscle function, and nerve signalling. Consult your healthcare provider for advice.

When to Test

This test may be recommended if you have persistent symptoms of magnesium deficiency despite normal serum levels, or if you have chronic conditions that may deplete intracellular magnesium.

Symptoms

Low Levels

Symptoms of low intracellular magnesium may include persistent muscle cramps, chronic fatigue, anxiety, insomnia, and heart rhythm irregularities that persist despite normal serum magnesium.

High Levels

Elevated intracellular magnesium is rare and typically reflects excessive supplementation. It may cause nausea, fatigue, and muscle weakness. Consult your healthcare provider if you suspect elevated levels.

Lifestyle Tips

Focus on consistent intake of magnesium-rich foods and stress management. Chronic stress can deplete intracellular magnesium more rapidly. Consider discussing supplementation strategies with your healthcare provider.

Frequently Asked Questions

Why test intracellular magnesium instead of serum?
Serum contains only about 1% of total body magnesium. Intracellular testing provides a more accurate reflection of your body's actual magnesium stores and functional status.
Can stress deplete intracellular magnesium?
Yes, chronic stress may increase magnesium utilisation and excretion, potentially depleting intracellular stores even when serum levels appear normal.
How often should I test intracellular magnesium?
Testing frequency depends on your health status and symptoms. Your healthcare provider can recommend an appropriate monitoring schedule.