IGF-1 LR3 1mg

IGF-1 LR3 is a research peptide based on human insulin-like growth factor-1 that laboratories use to study growth-factor signalling, protein synthesis, and metabolic pathways in controlled in-vitro systems.

IGF-1 LR3 (Long R3 Insulin-Like Growth Factor-1)

This Long R3 variant includes a 13-amino-acid extension and an arginine substitution at position 3. These sequence changes reduce binding to IGF-binding proteins (IGFBPs) and support sustained availability in experimental models.
For laboratory research only. Not for human use.

IGF-1 Key features

• Engineered to minimise IGFBP binding and support consistent readouts in vitro.
• Supplied as a lyophilised solid for stability and straightforward storage.
• Unit size: 1 mg per vial.
• Each batch released only after stringent quality checks

Specifications

• Product name: IGF-1 LR3
• Synonyms: Long R3 IGF-1; Long Arg3 IGF-1
• Molecular formula: C₄₀₀H₆₂₅N₁₁₁O₁₁₅S₉
• Molecular weight: 9,117.6 g/mol
• CAS: 946870-92-4
• Form: Lyophilised powder
• Appearance: White to off-white solid

Handling & storage

1. Storage (dry): Keep vials protected from light and moisture.
2. Reconstitution: Bring vial and diluent to room temperature. Reconstitute with
   Bacteriostatic Water 10 ml. Swirl gently — do not vortex.
3. After reconstitution: Store at 2–8 °C, protect from light, use aliquots to reduce handling, and avoid repeated temperature cycling.
4. Compatibility: Use only within research protocols that follow your lab’s SOPs and local regulations.

Looking for complementary materials? See
Bacteriostatic Water 10 ml and GH-axis companions such as
CJC-1295 (No DAC) 5 mg and
Ipamorelin 5 mg.

About IGF-1 LR3 in research

IGF-1 LR3 retains receptor-binding characteristics of native IGF-1 while its sequence modifications help sustain activity in vitro by limiting IGFBP interactions. Consequently, researchers use it to probe cell growth and differentiation, protein synthesis, and glucose-metabolism pathways in non-clinical models.

Synthesis & quality

Manufactured via controlled, validated peptide-synthesis processes to deliver high purity and lot-to-lot consistency. Each batch undergoes identity, purity, and appearance checks before release.

Legal & safety

XL Peptides supplies materials strictly for laboratory research. Products are not medications, foods, supplements, or cosmetics; not for human or veterinary use. By purchasing, you confirm you are a qualified researcher and will handle the material in line with your institution’s policies and applicable laws.

FAQs

What is IGF-1 LR3?
A modified IGF-1 peptide with a 13-residue extension and an Arg substitution at position 3, used to study growth-factor signalling in vitro.

How should I store the peptide?
Keep lyophilised vials away from light and moisture. After reconstitution, store at 2–8 °C, protect from light, and avoid repeated temperature cycling.

What diluent should I use?
Many labs use
Bacteriostatic Water 10 ml. Always follow your lab’s SOPs.

Do you provide documentation?
Yes. Batch documentation (e.g., Test Results) is available on request; if it’s not attached below, contact support and we’ll add it to your order.

Is this product for human use?
No. This material is for research only and is not intended for human consumption or clinical applications.

External resources for researchers

• UniProt — IGF-1 (human) overview
• NCBI Gene — IGF1
• PubChem — CAS 946870-92-4 (search)

Related research peptides

• CJC-1295 (No DAC) 5 mg
• Ipamorelin 5 mg
• Bacteriostatic Water 10 ml

Disclaimer

Used solely for in vitro experiments and cannot be:

– Used in clinical trials involving humans
– Administered to humans as part of an experiment or investigation
– Supplied to another party for human investigational use