IGF-1 LR3
Long-acting insulin-like growth factor-1 analog used in cell proliferation, differentiation and growth-signalling studies.
| Purity (HPLC) | ≥ 99.0% |
|---|---|
| Available sizes | 1 mg |
| Physical form | Lyophilized powder |
| Storage | -20°C, desiccated, protected from light |
What is IGF-1 LR3?
IGF-1 LR3 (Long R3 insulin-like growth factor-1) is an 83-amino-acid analog of human IGF-1, engineered with two changes: an arginine substitution at position 3 and a 13-residue N-terminal extension. Together these sharply reduce its affinity for IGF-binding proteins, so more of the molecule stays free and available in a research system.
It is supplied as a lyophilized powder in a sealed vial. Our reconstitution guide covers technique and the reconstitution calculator works out the dilution — useful here, since a 1 mg vial is typically taken to a much lower working concentration than the milligram-scale peptides.
Research context
IGF-1 LR3 is a standard reference compound in cell-culture work, where it is used to study proliferation, differentiation and growth signalling through the IGF-1 receptor. Its reduced binding-protein affinity is precisely what makes it useful in serum-containing media, where native IGF-1 would be substantially sequestered.
It sits downstream of the growth-hormone axis, so it is often examined alongside compounds that act on that axis upstream — HGH, Tesamorelin and secretagogues such as Ipamorelin.
Purity and third-party testing
Every batch is independently analysed by Testides and Peptide Test Canada and ships with a certificate of analysis reporting HPLC purity and MS identity. See how to read a certificate of analysis and what a purity figure actually means, or our Research and Quality page.
Handling and storage
As a larger protein analog, IGF-1 LR3 is more sensitive to temperature cycling and agitation than short peptides: keep it cold, avoid repeated freeze-thaw, and reconstitute gently. The storage guide covers lyophilized and reconstituted states, and bacteriostatic vs. sterile water covers diluent choice — bacteriostatic water is stocked alongside.
Related research compounds
Part of our growth-hormone research collection with CJC-1295 no DAC and CJC-1295 / Ipamorelin. New to this area? Start with Peptides 101 or the knowledge hub.
Research Use Only. Supplied strictly for in-vitro laboratory research and development. Not for human or animal consumption, diagnostic, or therapeutic use.
Frequently asked
No. IGF-1 LR3 is supplied strictly as a reference material for in-vitro laboratory research. It is not for human or animal consumption and is not intended for diagnostic or therapeutic use.
Yes. Every batch is independently tested by Testides and Peptide Test Canada for HPLC purity and mass-spectrometry identity, and ships with a batch-specific certificate of analysis (COA).
IGF-1 LR3 is available in 1 mg. Per-vial pricing is shown on this page.
IGF-1 LR3 is supplied as lyophilized powder. Use the reconstitution calculator to work out concentration and dosing volumes for your research, and see the storage and handling guide for temperature and shelf-life guidance. Store the lyophilized vial at -20 degrees C, desiccated and protected from light.
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