Hospital Lab
$80
cash pay
Other Labs
$25
+ lab fees
TestWell
$19.99
+ $6 lab fee
Magnesium is involved in over 300 enzymatic reactions in the body, including muscle and nerve function, blood sugar regulation, and blood pressure control. Despite its importance, an estimated 50% of Americans don't meet the recommended daily intake. Deficiency can cause muscle cramps, insomnia, anxiety, headaches, and irregular heartbeat.
Measures serum magnesium — a cofactor in 300+ enzymatic reactions including energy production, muscle contraction, sleep regulation, and blood-sugar control.
Anyone with muscle cramps, restless legs, insomnia, palpitations, migraine, or on medications that deplete magnesium (PPIs, diuretics, metformin). Increasingly ordered alongside Vitamin D for general wellness.
Sample Type
Blood draw
Fasting
Not required
Results In
2–4 business days
Performed At
Quest or Labcorp
Your Magnesium results will include values for each of the 1 biomarker tested, along with reference ranges. Results are reviewed by a licensed physician before being released to your secure portal.
If any values fall outside the normal range, your report will include guidance on what that may mean and recommended next steps. You'll receive an email notification when your results are ready, typically within 2–4 business days.
Typical reference range layout
Lab reports show where your value sits relative to established reference intervals—your physician interprets this in context for you.
Your Magnesium results will include values for each of the 1 biomarker tested, along with reference ranges. Results are reviewed by a licensed physician before being released to your secure portal.
If any values fall outside the normal range, your report will include guidance on what that may mean and recommended next steps. You'll receive an email notification when your results are ready, typically within 2–4 business days.
Typical reference range layout
Lab reports show where your value sits relative to established reference intervals—your physician interprets this in context for you.
No fasting required.
No fasting required.
TestWell Price
$19.99
+ $6 lab processing fee at checkout
No insurance needed · HIPAA compliant
Better value: the Vitamin & Mineral Deficiency Panel
Save $106.92This test is part of the Vitamin & Mineral Deficiency Panel — 9 tests · 9 biomarkers for $189.99, $106.92 less than à la carte.
$189.99$296.91
9 tests · 9 biomarkers
Frequently ordered together
Customers who ordered Magnesium also added these for a more complete health picture.
Not sure where to start?
Magnesium
$19.99