IGF-1 LR3
Growth Factor Peptide - Long-arginine IGF-1 analog studied for cellular growth signaling.
IGF-1 LR3 is a modified analog of insulin-like growth factor 1 with an extended half-life, studied for its role in cellular growth and proliferation research.
IGF-1 LR3 is an engineered analog with reduced binding-protein affinity and a longer half-life, giving researchers a more persistent IGF-1 signal than the native growth factor. It is studied for cellular growth and proliferation endpoints in vitro.
IGF-1 LR3 specifications
- CAS number
- 946870-92-4
- Molecular formula
- C400H625N111O115S9
- Molecular weight
- 9117.6 g/mol
- Sequence
- Long R3 insulin-like growth factor 1
- Residues
- 83 residues
- Presentation
- Lyophilized powder
- Documented purity
- 99.67% by HPLC
- Available sizes
- 1mg ($65)
- Archived COA lots
- 2
- Intended use
- Laboratory research use only. Not for human or veterinary use.
Studied pathways
- IGF-1 receptor - Long-acting analog studied for sustained IGF-1-receptor activation.
Reported mechanisms in the literature
- IGF-1 receptor - A long-arginine analog of insulin-like growth factor 1 with an extended half-life, studied for sustained IGF-1-receptor activation and cellular growth signaling. (Preclinical literature)
What IGF-1 LR3 is researched for
- Cellular growth - Studied for sustained IGF-1-receptor activation and cell-proliferation endpoints. (Preclinical literature)
- Hypertrophy research - Investigated for anabolic-signaling endpoints in muscle-cell models. (Preclinical literature)
IGF-1 LR3 certificates of analysis on file
Every lot below was tested by an independent laboratory and the full report is published as a PDF. Purity is shown exactly as the report states it. The same records are searchable in the COA library and can be checked on the lot verification page.
| Lot | Tested | Size | Laboratory | HPLC purity | Identity | Certificate |
|---|---|---|---|---|---|---|
| IG1-WM2607-001 | 27 Aug 2026 | 1mg | Freedom Diagnostics | 99.75% | Confirmed (LC-MS/MS) | COA PDF |
| FD-2605050307 | 7 May 2026 | 1mg | Freedom Diagnostics | 99.67% | Confirmed (LC-MS/MS) | COA PDF |
Published literature on IGF-1 LR3
The mechanisms above trace to peer-reviewed studies indexed on PubMed. These are independent third-party publications, not Aspect Peptides claims. Browse indexed research on PubMed.
IGF-1 LR3 frequently asked questions
What is IGF-1 LR3?
A modified analog of insulin-like growth factor 1 with an extended half-life, studied for cellular growth, proliferation and anabolic signaling.
Is it approved for human use?
No. It is a research material only, with preclinical data. It is not a medicine or supplement.
What is it researched for?
Sustained IGF-1-receptor activation and its downstream growth/proliferation signaling in cell models.
Documented to 99.67% purity by HPLC · third-party COA every lot · from $65 · For laboratory research use only.
Related Growth Hormone compounds
- Tesamorelin - GHRH analog studied for growth-hormone-axis research.
- TESA / IPA Blend - Tesamorelin + Ipamorelin co-formulated GH-research blend.
- Ipamorelin - Selective GH secretagogue studied for receptor-selective GH release.
- CJC-1295 - GHRH analog studied for sustained GH signaling.
- CJC-1295 DAC - Long-acting GHRH analog with drug-affinity complex.
- Sermorelin - GHRH(1-29) fragment studied for GH-axis research.