Biotin (Vitamin B7)
Your vitamin B7 status, behind hair, nail, and skin complaints and a notorious lab-test interfering agent.
Consider this test if:
- Thinning hair, brittle nails, or a scaly rash around the eyes, nose, or mouth
- Malabsorption, long-term anticonvulsant use, or parenteral nutrition without added biotin
- Taking high-dose biotin supplements and wanting to confirm your level before they skew other lab tests
- Unexplained lethargy, low mood, or tingling in the hands and feet alongside skin or hair changes
- Pregnancy, when biotin requirements rise and mild deficiency is more common
- HSA/FSA eligible
- Typical results in 2-7 days · Reviewed by a real clinician
- Drawn at a CLIA/CAP-accredited lab near you ·
Pre-test considerations
No fasting required. High-dose biotin supplements raise your level and also interfere with many other immunoassay-based blood tests, so note your dose and timing; many clinicians advise pausing biotin supplements for one to two days before testing for an accurate baseline.
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What this test is for
Biotin (vitamin B7) is a water-soluble B vitamin that acts as a cofactor for the carboxylase enzymes driving fat, protein, and carbohydrate metabolism. True deficiency is uncommon, but it shows up with prolonged raw egg-white intake, some malabsorption conditions, long-term anticonvulsant use, certain liver disease, and pregnancy, producing thinning or discolored hair, brittle nails, a scaly rash around the eyes, nose, and mouth, and neurologic symptoms like lethargy, depression, or tingling in the hands and feet. This test measures the biotin concentration in your blood, which helps confirm whether low intake or absorption is contributing to those findings. It is also worth knowing that high-dose biotin supplements, popular for hair and nails, can distort other lab results, including thyroid and cardiac panels, so confirming your actual level has practical value. If you are taking biotin and chasing better hair or nails, this test tells you whether you were ever low to begin with.
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 2-7 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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$9 /mo
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Without membership
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At-cost pricing on labs, scans, and more
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Personalized action plans across supplements, exercise, nutrition, and sleep
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All your health records in one personal vault, with trends and biological age tracking
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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 — never a profit on the test itself; Mito makes its money on the $9 membership, not on marking up your tests. Membership is $9/mo, and you still pay the lab’s order fee. Prices are itemized before you pay, with no hidden fees.
Where do I get tested?
Choose a partner lab (Quest, Labcorp, or BioReference) at checkout. If your cart spans multiple tests, we consolidate the whole order onto a single lab so you only make one visit.
Is this eligible for HSA/FSA?
Yes. This test is HSA/FSA eligible, and you can pay with your HSA/FSA card at checkout.
When will I get my results?
Your results post to your dashboard once your lab completes them, then a clinician reviews them and your full analysis and personalized action plan (with clear next steps) follow. Turnaround varies by test: specialty assays and at-home kits take longer, and each test shows its expected turnaround before you buy.
Do I need a doctor’s order?
No. Mito provides the lab order for you, so you can book and get tested without a separate doctor visit.
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