Electrolytes & Minerals
Magnesium test cost — $6.40–$29.95
Magnesium · measured in mg/dL
Keep magnesium high-normal — test RBC magnesium ideally.
Higher is betterReference range
1.7–2.2 mg/dL
Serum measurement only. Do not use this interval for red-blood-cell magnesium.
Optimal range / clinical target
A separate universal ‘optimal’ interval is not established in the cited guidance. The goal depends on why you were tested; aiming for the middle or an extreme of the reference interval is not a treatment plan.
Examples are educational, not your reporting lab’s interval.
NIH MedlinePlus: serum magnesiumMagnesium test prices
Compare direct-pay test prices, without using insurance. Test prices are shown before separate collection fees.
Tracking more than one biomarker?
Build a list to compare test and panel combinations, with one blood-draw fee in your GoodLabs estimate.
$12 blood draw per visit, added once to your order.
Collection fee is additional; not included in this test price.
* Estimated test price.
Does insurance cover Magnesium testing?
When a clinician orders Magnesium for a diagnosis or to follow a known condition, most plans cover it — and many cover routine screening as $0 preventive care for eligible adults. The catch is you need a qualifying reason and an in-network order; a “I just want to see my number” request often isn’t covered, and if you haven’t met your deductible you can end up paying the lab’s full list price anyway.
The direct-pay prices above skip insurance entirely: you pay the cash price, test on your own schedule with no doctor visit, and it’s HSA/FSA-eligible. For a single marker that’s often cheaper — and faster — than a copay plus deductible exposure.
Magnesium inside a bundle
Every compared membership/panel that includes Magnesium, cheapest first. Worth it when you want several markers at once rather than a single test.
| Provider | Model | Advertised panel | Price |
|---|---|---|---|
| Superpower | Annual membership | 103+ 73 biomarkers mapped | $199/yr |
| Hundred | Annual membership | 160+ 74 biomarkers mapped | $199/yr |
| Function Health | Annual membership | 160+ 88 biomarkers mapped | $365/yr |
| Blueprint (Bryan Johnson) | Annual membership | 160+ 88 biomarkers mapped | $365/yr |
| HealthieOne | One-time test | 250+ 50 biomarkers mapped | $420/test + draw |
| InsideTracker | Membership + à-la-carte tests | 48+ 46 biomarkers mapped | $489 (1st test) |
| OneTwenty | Annual membership | 85+ 51 biomarkers mapped | $499/yr |
| Lifeforce | Subscription + diagnostic | 51+ 49 biomarkers mapped | ~$2,137/yr |
What Magnesium is
A cofactor for 300+ enzymes including ATP handling, DNA synthesis, and vascular tone. Serum magnesium is only ~1% of body stores and poorly reflects intracellular status.
Why it matters for longevity & performance
Higher-normal magnesium associates with lower cardiovascular disease, arrhythmia, diabetes, and mortality; because serum is insensitive, RBC magnesium is preferred.
Magnesium testing — frequently asked
Do I need to fast for a Magnesium test?
No. Magnesium does not require fasting — you can test any time of day.
Do I need a doctor's order to get a Magnesium test?
No. Direct-to-consumer labs (GoodLabs, Ulta, Quest and Labcorp OnDemand) include the physician order in the price — you order online and visit a draw site, no appointment with your own doctor needed.
How fast are Magnesium results?
Usually 1–3 business days after your blood draw; most results post to the lab's online portal.
What's the difference between the standard and optimal Magnesium range?
Reference intervals describe results in a reference population; they do not by themselves diagnose or exclude disease. A treatment target depends on the condition and the person. A separate universal ‘optimal’ interval is not established in the cited guidance. The goal depends on why you were tested; aiming for the middle or an extreme of the reference interval is not a treatment plan.
Does insurance cover Magnesium testing?
Often, when ordered for a diagnosis; many plans cover it as preventive care at no cost for eligible adults. The direct-pay prices above let you skip insurance and test on your own schedule.
Related Electrolytes & Minerals biomarkers
Educational guidance. Use your reporting lab’s reference interval and discuss personal targets and results with your clinician.