Calcium, Total (Red Blood Cells)
A specialized look at calcium held inside red blood cells, not the calcium floating in your blood.
Consider this test if:
- A clinician has specifically requested intracellular calcium rather than a standard blood level
- Investigating cellular calcium handling that serum calcium does not capture
- Following up on a specialized workup where red-cell mineral content is being tracked
- You want this specific analyte rather than the routine serum calcium test
- HSA/FSA eligible
- Results delivered to your dashboard · Reviewed by a real clinician
- Drawn at a CLIA/CAP-accredited lab near you ·
Pre-test considerations
No specific fasting instructions are established for this test. The specimen has strict handling requirements: red blood cells collected in a sodium heparin (green-top) tube, transported refrigerated in an acid-washed tube, since the sample is unstable at room temperature. If you are choosing between calcium tests, confirm with your clinician that the red-blood-cell version is the one intended, as serum or ionized calcium answers most clinical questions.
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What this test is for
This test measures total calcium inside red blood cells, reported relative to hemoglobin (mg/g). It reflects intracellular calcium content rather than the calcium circulating in your bloodstream, and it is a specialized rather than routine measurement.
For everyday questions about calcium status, bone health, parathyroid function, or symptoms like muscle cramps and fatigue, serum calcium is the standard test, and ionized calcium is the right choice when you need the physiologically active fraction unaffected by albumin. The 24-hour urine calcium tests are used to assess how much calcium the kidneys excrete, relevant for kidney stones. This red-blood-cell version answers a narrower research-oriented question about calcium held within cells.
- Specimen
- Red blood cells
- Measures
- Count
What you'll learn
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Insights that connect the dots. A clinician reads your whole picture, not one result in isolation, connecting family history, past results, and lifestyle into clear next steps.
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Your personalized action plan. Nutrition, supplements, and training in one clinician-reviewed protocol, updated as your results change.
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Track your trends. Upload results from any lab and see each biomarker trend over time, so you know what is working.
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Never miss a recheck. Mito tells you what is worth retesting and when, then reminds you so nothing slips.
What to expect
- 1 Book instantly
Click, book, done. Choose a convenient lab location near you. Transparent, up-front pricing.
- 2 Quick lab visit
Testing to fit your busy schedule, usually 15 minutes or less. Walk-in and appointments available.
- 3 Fast, dashboard-delivered results
Your results post straight to your dashboard as soon as the lab completes them.
- 4 Expert guidance
Included with Mito membership. A clinician reviews your results and your personalized action plan follows, with clear next steps.
Everything your health needs,
in one membership
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Every test at our cost
Members pay our cost on every test, with lab fees passed straight through. The full receipt is itemized, never padded.
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Continuous tracking, all in one place
Upload past labs and watch your trends over time. Every marker and visit lives in one longitudinal record, so all your care stays together.
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Year-round clinician support
Text anytime and get clinician-reviewed answers. When you want to go deeper, 1:1 consultations are available at affordable rates.
All for $9/month
Order any test or consult without joining. For $9/month, members unlock member prices, trend tracking, and year-round clinician guidance.
Mito Membership
$9 /mo
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Without membership
$0
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Frequently asked questions
View all FAQsHow does pricing work?
Every test shows the member price next to the standard non-member price, so you can see what membership saves you. The member price is our cost, covering the lab and what it takes to run the service. It is never a profit on the test itself. Mito makes its money on the $9 membership, not on marking up your tests. Membership is $9 per month, and any applicable lab order or draw fee is itemized before you pay.
Where do I get tested?
Choose an available partner lab at checkout. If your cart contains multiple blood tests, Mito helps consolidate the eligible tests at one lab when possible. At-home kits and scans follow the collection or appointment process shown on their product page.
Is this eligible for HSA/FSA?
Yes. Eligible tests can be paid for with an HSA or FSA card at checkout.
When will I get my results?
Your results appear in your Mito dashboard after the laboratory completes processing. A clinician then reviews them before your analysis and personalized action plan are finalized. Timing varies by test, and specialty assays and at-home kits may take longer.
Do I need a physician's order?
No. Mito provides the laboratory order when one is required, so you do not need to arrange a separate physician visit before purchasing.
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