All lab markers

Vitamins & minerals

Magnesium RBC

Magnesium inside the cell, where it actually works. Lower results are the ones to watch. A common adult reference interval is 4.2–6.8 mg/dL.

Typical adult range

Reference interval
4.2–6.8 mg/dL
Often-cited tighter window
5–6.5 mg/dL

Intracellular magnesium status. Your own lab's printed range is the one that applies to your result.

What commonly moves it

  • Absorption problemGut permeability or low stomach acid limits iron, B12 and fat-soluble uptake.

These are commonly described physiological relationships, shared for education. They are not a diagnosis and cannot account for your medications, history, or symptoms — discuss your results with a licensed clinician.

Watching Magnesium RBC over time?

Dose Compass charts each draw, flags meaningful moves, and helps you prepare questions for your clinician.

Start tracking