Hormones
IGFBP-3
The protein that carries almost all of the IGF-1 in your blood.
Unit µg/mLTypical adult range 2.2–7.8 µg/mL
What it is
The protein that carries almost all of the IGF-1 in your blood.
Why it matters
It is measured with IGF-1 because it is less affected by nutrition, so the pair separates a genuine growth hormone problem from simply being underfed.
Reading the number
It is a supporting value and is rarely informative alone. Like IGF-1 it declines with age and needs an age-matched range.
What moves it
agegrowth hormonenutritionkidney function
Read alongside
When to raise it
Worth reading with IGF-1 rather than on its own.
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 IGFBP-3.
Proteína-3 de transporte de IGF-I [IGFBP-3]IGFBP3
Catalog entry last updated 2026-08-28. Browse all 165 metrics.