Selenium, Blood
An essential trace mineral that matters most at the extremes, from deficiency to toxic overexposure.
Consider this test if:
- On long-term parenteral nutrition or recovering from severe malnutrition
- Taking high-dose selenium supplements and want to confirm you are not overdoing it
- Working around industrial selenium, electronics, glass, ceramics, or copper refining
- Unexplained muscle weakness, brittle nails or hair, or skin changes worth investigating
- Following a very restricted diet and checking trace-mineral status
- HSA/FSA eligible
- Typical results in 2-4 days · Reviewed by a real clinician
- Drawn at a CLIA/CAP-accredited lab near you ·
Pre-test considerations
No fasting required. If you take selenium supplements or a multivitamin containing selenium, note the dose and timing, since recent intake raises the result; for a true baseline, some choose to test before starting or after a consistent routine. Occupational or environmental exposure is worth mentioning to your clinician.
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What this test is for
Selenium is an essential trace mineral built into antioxidant enzymes and thyroid hormone metabolism. This whole-blood test reflects recent intake and exposure, useful both for confirming adequacy and for catching the extremes. Deficiency is uncommon but real in long-term parenteral nutrition, severe malnutrition, or restricted diets, and can produce muscle pain and weakness, cardiomyopathy, and changes in skin and hair. High levels point to overexposure, often industrial or supplement-driven, with signs like garlic breath, brittle nails and hair, and skin or nerve symptoms.
This whole-blood measurement captures circulating selenium for monitoring intake and exposure. The separate serum or plasma test is the routine status measure, while the RBC selenium test reflects longer-term stores over the red cell's lifespan.
- Specimen
- Whole blood
- Measures
- Mass concentration
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 Typical results in 2-4 days
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.
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Without membership
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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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