Research brief · Growth Hormone
IGF-1 LR3
Long-acting IGF-1 analogue for anabolic and myogenesis research.
Class
Long-Arg3 IGF-1 analogue
Half-life
~20–30 h
Studied in
Anabolic signaling and myogenesis studies.
What it is
IGF-1 LR3 is a long-arginine-3 analogue of IGF-1 with reduced affinity for IGF binding proteins, extending the free-fraction half-life in anabolic and myogenesis research.
Mechanism studied
Reduced binding to IGFBPs prolongs free fraction.
Research notes
- Reduced IGFBP binding distinguishes it from native IGF-1 in assays.
Before sourcing any material
- Confirm a lot-matched third-party certificate of analysis (HPLC purity and mass-spectrometry identity).
- Check the stated peptide content per vial, not just the gross vial mass.
- Plan reconstitution volumes first so the vial size matches your protocol.
- Verify what is lawful in your jurisdiction — these are in-vitro research reagents, not medicines.