Bone-Specific Alkaline Phosphatase (BSAP)
A direct readout of bone-building activity, useful for tracking how bone responds to treatment.
Consider this test if:
- Starting or already on osteoporosis therapy and tracking whether bone turnover is responding
- Total alkaline phosphatase is elevated and you need to separate a bone cause from a liver cause
- Monitoring Paget's disease of bone or other conditions with high bone turnover
- Building a baseline of bone formation activity to compare against future tests
- 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 fasting required. A single morning blood draw is standard. Note any bone-active medications such as bisphosphonates, denosumab, teriparatide, or hormone therapy, since the point of the test is often to see how these change the result; keep timing consistent between tests so values are comparable.
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What this test is for
Bone-specific alkaline phosphatase (BSAP) is an enzyme released by osteoblasts, the cells that build new bone, so it serves as a specific index of bone formation. Levels rise when bone turnover is high, as in osteoporosis treatment, Paget's disease of bone, healing fractures, vitamin D deficiency, hyperparathyroidism, and certain bone metastases. BSAP is one of the most useful markers for following whether antiresorptive or bone-building therapy is changing bone activity, often shifting months before bone density scans show a measurable difference. Unlike total alkaline phosphatase, which also reflects the liver, BSAP isolates the bone fraction, which matters when liver enzymes are also elevated. It is a turnover marker, not a measure of bone density, so it is read alongside a DEXA scan rather than in place of one.
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
pay as you go
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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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