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IGFBP-3 (IGF Binding Protein 3)
Specialistalso —
What it isThe dominant carrier protein for IGF-1 in circulation, regulating how much IGF-1 is free to act on tissues.
DoesBuffers IGF-1 availability and extends its half-life.
GoodA mid-range IGFBP-3 with appropriate IGF-1 signals balanced growth hormone axis.
BadPatterns of IGFBP-3 versus IGF-1 help clinicians evaluate growth hormone disorders.
- Standard
- 2–6 mg/L.
- Optimal
- 3.5–5.5 mg/L (narrow target)
- Modifiers
- Tracks IGF-1 broadly; declines with age.
How to optimize
- Lifestyle
- Same as IGF-1.
- Diet
- Same as IGF-1.
- Supplements
- Same as IGF-1.
- Peptides
- CJC-1295, ipamorelin, sermorelin, tesamorelin.
- Drugs
- —
TesamorelinIpamorelinSermorelin
Reference ranges are general adult lab norms; optimal ranges are editorial picks from the longevity literature — not medical advice. Always interpret results with your physician.
within Blood Sugar & Metabolic