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Bone

CTX (beta-CrossLaps)

A fragment of collagen released into the blood as bone is broken down and rebuilt, so a measure of how fast bone is turning over.

Unit ng/mLTypical adult range 0.01–0.704 ng/mL
What it is

A fragment of collagen released into the blood as bone is broken down and rebuilt, so a measure of how fast bone is turning over.

Why it matters

It responds within weeks, where a bone density scan takes a year or more to show a change -- which makes it the number that says early whether a bone treatment is working.

Reading the number

It is the most preanalytically fragile value on this panel: it falls sharply after eating and drops through the morning, so it is drawn fasting and early, and only fasted morning samples compare with each other.

What moves it
fasting statetime of daybone treatmentsvitamin D statusrecent fracture
Read alongside
Parathyroid hormone (intact)CalciumBone mineral contentAlkaline phosphatase
When to raise it

Worth discussing a rising trend on fasted morning samples.

Tracking only, not a diagnosis. The range above is a typical adult reference range — the range printed by the lab that ran your test is the one that applies to you. Discuss anything that concerns you with your doctor.

Also known as

On a report in another language.

A lab report names this analyte in its own language. Vitals Vault recognises each of these and files them all under CTX (beta-CrossLaps).

Cross-links telopép. C-terminal colag. tipo I (CTX)CTXBeta-CrossLapsTelopéptido C-terminal

Track your ctx (beta-crosslaps) over time.

CTX (beta-CrossLaps) is one of 165 analytes Vitals Vault charts over time. Import a lab report in any language and this number lands on a timeline only you can read.

Continue with Google
Tracking only. This app is not medical advice. Always discuss results and future analysis with your doctor.

Catalog entry last updated 2026-08-28. Browse all 165 metrics.