IGF-1 LR3 (Long R3 IGF-1) is a modified form of insulin-like growth factor 1 with enhanced potency and extended half-life. Our current lot, AM20260925-17, tested 99.17% HPLC purity with identity confirmed by Accumark Labs (report 5CA9-GKY9, completed Oct 1, 2026)
Lot AM20260925-17
Tested on the 0.078 mg vial
Sample received Sep 24, 2026 · Analysis completed Oct 1, 2026
Conforms spec > 98.0%
Conforms
Measured
Figures copied exactly from Accumark Labs's report 5CA9-GKY9.
Catalog no. PH-IGF1LR3-001Size 0.1mgMW (reference) 9111.0 DaSequence 83 amino acid sequence
IGF-1 LR3 (Long R3 IGF-1) is a modified form of insulin-like growth factor 1 with enhanced potency and extended half-life. The modifications prevent IGF binding protein interactions, increasing bioavailability.
Mechanism of Action
IGF-1 LR3 features a 13-amino acid N-terminal extension and an Arg-to-Glu substitution at position 3, dramatically reducing binding to IGF binding proteins. LR3IGF-I infusion stimulates organ growth while reducing plasma IGF binding protein concentrations (Conlon et al., 1995). This results in prolonged activity and enhanced anabolic effects, with LR3IGF-I capable of supporting cell growth at concentrations at least 200-fold lower than required for insulin (Frenkel et al., 2007).
Research Applications
Product Specifications
References
IGF-1 LR3 is supplied as a lyophilized powder. Keep it sealed, dry, and away from light until reconstitution.
Lyophilized material is stable when frozen. Once reconstituted, keep it cold and minimise handling to preserve integrity.
IGF-1 LR3 is a synthetic peptide compound used in laboratory research settings. Researchers studying growth hormone releasing hormone pathways use this compound to investigate cellular signaling pathways, receptor binding affinities, and structure-activity relationships. Its available Certificate of Analysis documents the reported laboratory results.
IGF-1 LR3 is a research compound supplied for in-vitro laboratory use. Also known as IGF1 LR3, IGF-1LR3. Sequence: 83 amino acid sequence. Supplied for growth hormone releasing laboratory research. A third-party Certificate of Analysis is published for the current lot. Research Use Only — not for human or veterinary use.
The current Certificate of Analysis for IGF-1 LR3 reports 99.17% purity by HPLC (Accumark Labs report 5CA9-GKY9).
Yes. Accumark Labs report 5CA9-GKY9 for IGF-1 LR3 is on our COA page, with a link to the lab's own report.
IGF-1 LR3 is supplied as a lyophilized powder. Store it at −20°C or below, protected from light and moisture — lyophilized material is stable frozen. Once reconstituted, keep it refrigerated and avoid freeze-thaw cycles.
Orders ship at a $15 flat rate, free on orders of $200 or more, in discreet, insulated packaging. Domestic delivery takes 2–3 business days — 2-day across California, nearby Nevada, and on orders of $250+.
No. IGF-1 LR3 is supplied strictly for in-vitro laboratory research. It is not for human or veterinary use, consumption, or diagnostic or clinical applications.
Yes. IGF-1 LR3 is also spelled or referred to as IGF1 LR3, IGF-1LR3. These are naming variants of the same compound, not different products.
Open the lab report link on our certificate page — it goes to Accumark Labs's own verification portal, not a file we host, so the result can't be edited by us. Confirm the report ID (5CA9-GKY9) and figures match what's shown here.
The 0.1mg size of IGF-1 LR3 is $500.00 per mg. See the size selector above for per-mg pricing on every available size.
