C-Telopeptide, Serum
C-Telopeptide (CTX) is a breakdown product of bone collagen that appears in blood when bone is being remodeled or lost. It's ordered to assess bone turnover rate, screen for osteoporosis risk, monitor bone health during menopause or aging, and evaluate treatment response in bone-related conditions.
High-intensity training and endurance exercise can increase bone turnover temporarily. CTX helps athletes and coaches identify excessive bone loss from overtraining, inadequate nutrition, or hormonal imbalance—particularly relevant for runners, female athletes with low energy availability, and older athletes concerned with fracture prevention. Persistently elevated CTX may signal that training load or recovery isn't supporting skeletal health.
Turnaround Time
3 days (up to 7 days)
Method
Electrochemiluminescence immunoassay (ECLIA)
Order online
Choose your lab and check out. We send your lab requisition automatically — no doctor visit needed.
Get your sample collected
Visit a lab service center near you for a quick blood draw (or book at-home phlebotomy where available).
See your results
Your results land in your Insider portal, ready to review and act on — that easy.
Your price
$105.00$315
3.0× less than retail
Versus the typical direct-to-consumer retail price for this test (illustrative — consumer prices vary by provider and region).
$105.00
Peer-reviewed sources supporting the educational content on this page.
C-Telopeptide, Serum
C-Telopeptide (CTX) is a breakdown product of bone collagen that appears in blood when bone is being remodeled or lost. It's ordered to assess bone turnover rate, screen for osteoporosis risk, monitor bone health during menopause or aging, and evaluate treatment response in bone-related conditions.
The C-Telopeptide, Serum test starts at $105.00 at Labcorp. No doctor's visit and no insurance needed; we do not bill insurance. Fitomics Insider members pay from $95.00.
Results for the C-Telopeptide, Serum test are typically ready about 3 days after your draw, and up to 7 days for some samples. Your results land in your Insider portal.
No. When you order the C-Telopeptide, Serum test from Fitomics Research Labs, a licensed physician in our 50-state network reviews and signs your requisition after checkout, and it lands in your portal and inbox. Then visit any Labcorp, Quest, or BioReference patient service center for your draw; results post to your Insider portal.
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