Magnesium, RBC

Red Blood Cell (RBC) Magnesium measures the magnesium concentration inside red blood cells. Since most magnesium is intracellular (~99%), RBC magnesium is considered a better indicator of the body's magnesium stores and functional status than serum magnesium (which reflects <1% of total body Mg and is poorly correlated with stores). Magnesium is vital for muscle and nerve function, energy production (ATP), blood glucose control, blood pressure regulation, bone health, and over 600 enzymatic reactions.