test1 biomarkers

Magnesium (RBC)

Measures magnesium levels inside red blood cells to assess cellular function and deficiency.

What This Test Measures

Specimen & Collection

Sample Type

Red Blood Cells

Turnaround

1-2 business days

Biomarkers

1 included

Preparation

No fasting is required for this test. Inform your healthcare provider of all medications and supplements you are taking, as some may affect magnesium levels.

Biomarkers Included (1)

Click any biomarker for detailed information

Magnesium

Magnesium is a mineral essential for muscle function, energy production, and nerve signaling. A 24-hour urine magnesium test measures how much magnesium your body excretes, helping assess magnesium status and kidney function. Low urinary magnesium may indicate deficiency or malabsorption, while high levels could suggest excessive losses or dietary overload. This test is useful for evaluating muscle weakness, irregular heartbeat, and metabolic concerns.

Medical Disclaimer

This information is for educational purposes only and does not constitute medical advice, diagnosis, or treatment. Always consult with a qualified healthcare provider regarding any medical condition or treatment plan.

Lab results should be interpreted by a licensed healthcare provider in the context of your complete medical history. Processing times may vary by laboratory. Charges will not be submitted to insurance, Medicare, or Medicaid. Direct-access lab testing is not available in NY, NJ, or RI.

Order This Test

Regular Price

$24.70

Member Price

$23.70Save $1.00

$49/year membership

No doctor visit required to order

Results reviewed by board-certified physicians

CLIA-certified laboratory testing

Secure, confidential results

How It Works

1Add tests to your cart and check out

2Find a lab location near you

3Visit the lab with your requisition

4Get your results online