IGF-1 LR3 Research Information
Long-Arginine Insulin-Like Growth Factor-1
For Muscle Growth & Regenerative Research
â ïļ Important: This information is for educational and research purposes only. Always consult with a qualified healthcare professional before use.
ð Contents
ðŽ What is IGF-1 LR3?
IGF-1 LR3 is a synthetic analog of Insulin-like Growth Factor-1 with an extended half-life and increased biological activity. It is a 83-amino acid peptide that is produced through recombinant DNA technology, specifically engineered with an arginine substitution at position 3 and an 13-amino acid extension peptide (MFPAMPLSSLIFV) at the N-terminus.
The main improvement of IGF-1 LR3 over native IGF-1 is its reduced binding to IGF-binding proteins (IGFBPs), which increases its bioavailability and half-life from approximately 12 hours to several days. This makes it a potent anabolic peptide for research on muscle growth, tissue repair, and cellular regeneration. IGF-1 LR3 is available in pen and freeze-dried vial formulations for research purposes.
⥠How IGF-1 LR3 Works
IGF-1 LR3 works through multiple mechanisms to promote anabolic and regenerative effects:
IGF-1 Receptor Binding
Binds to IGF-1 receptors with high affinity, activating downstream signaling pathways
Protein Synthesis
Stimulates muscle protein synthesis and inhibits protein breakdown
Reduced Binding
Reduced affinity for IGFBPs increases bioavailability and half-life
IGF-1 LR3 promotes muscle growth, cell proliferation, and differentiation through the PI3K/Akt and MAPK/ERK signaling pathways. Its extended half-life allows for less frequent dosing while maintaining biological activity.
ð Research Applications
Muscle Growth
Studying hypertrophy, muscle regeneration, and protein synthesis
Tissue Repair
Investigating wound healing and tissue regeneration
Cellular Proliferation
Researching cell growth, differentiation, and anabolic signaling
Bone & Cartilage
Studying osteogenesis and cartilage repair mechanisms
ð Clinical Studies
Anabolic & Muscle Growth Research
- IGF-1 LR3 has shown significant anabolic effects in both in vitro and in vivo research
- Increased muscle protein synthesis and reduced protein breakdown in animal models
- Stimulates satellite cell proliferation and differentiation for muscle regeneration
- Promotes hypertrophic growth and enhanced muscle fiber size
Extended Half-Life & Bioavailability
- Reduced binding to IGF-binding proteins (IGFBPs) increases bioavailability
- Half-life extended from approximately 12 hours to several days
- Allows for less frequent dosing while maintaining biological activity
- Higher potency compared to native IGF-1 in research models
Regenerative Medicine Research
- Demonstrated potential in wound healing and tissue regeneration models
- Stimulates cell proliferation and differentiation in various cell types
- Investigated for potential applications in musculoskeletal repair
- Promotes osteogenesis in bone repair research
ð Interactive Dosing Guide
Select your vial size and dose to see the corresponding volume, clicks, dosing frequency, and how many doses per vial:
ðïļ Step 1: Select Your Vial Size
ð Step 2: Select Your Dose
Common research protocols: 0.01-0.05 mg per injection, typically administered daily
Vial Size
0.1mg Vial
Selected Dose
0.01 mg
Doses per Vial
10 doses
Pen Clicks
30 clicks
Volume
0.30 mL
Protocol Level
Level 1 (Starting)
Recommended Schedule
Once daily - Loading Phase
â ïļ Do not change your dose unless advised by a qualified professional.
ð Protocol Level Summary
Based on research protocols: 0.01-0.05 mg per injection, typically administered once daily.
| Protocol Level | Target Dose | Frequency | 0.1mg Clicks | 1mg Clicks | Who It\'s For |
|---|---|---|---|---|---|
| Level 1 (Starting) | 0.01 mg | Once daily | 30 clicks | 3 clicks | New users, first week |
| Level 2 (Standard) | 0.02 mg | Once daily | 60 clicks | 6 clicks | After first week, maintenance |
| Level 3 (Advanced) | 0.03-0.04 mg | Once daily | 90-120 clicks | 9-12 clicks | If more response needed |
| Level 4 (Maximum) | 0.05 mg | Once daily | 150 clicks | 15 clicks | Experienced users only |
â ïļ Do not change your dose unless advised by a qualified professional.
ð Vial Users (Insulin Syringe)
Add 3mL of bacteriostatic water to your freeze-dried vial and mix gently. After reconstitution, use the table below to draw your dose:
Vial Size
0.1mg vial with 3mL bac water
| Dose | Frequency | Units on Syringe | Volume (mL) | Protocol Level |
|---|
â ïļ Always use a new sterile needle and syringe for each injection.
â ïļ Safety & Precautions
IGF-1 LR3 is a potent anabolic peptide with limited human safety data. The potential benefits should be weighed against the risks, including the theoretical risk of promoting cell proliferation in certain contexts.
- Injection site reactions: Redness, tenderness, or pain at injection site
- Hypoglycemia: Potential for blood sugar lowering due to insulin-like effects
- Edema: Possible fluid retention
- Joint pain: Occasional and mild
Important Safety Considerations:
- IGF-1 LR3 is not FDA-approved for human use
- Theoretical risk of promoting cell proliferation and tumor growth
- Should be used with caution in research settings only
- Do not use if allergic to IGF-1 LR3 or any ingredients
- Do not use if pregnant or breastfeeding
â ïļ Warning: IGF-1 LR3 is an investigational research peptide with potent anabolic effects. If you experience severe allergic reactions, difficulty breathing, or signs of anaphylaxis, seek immediate medical help.
ð References
- IGF-1 LR3 Research Overview. Peptide Sciences.
- IGF-1 LR3 Product Information. GlpBio.
- IGF-1 LR3: Mechanism of Action and Research Applications. Journal of Peptide Research.
- IGF-1 LR3 Dosage and Protocol Guide. Peptide Institute.
This information is for educational and research purposes only. Always consult with a qualified healthcare professional.
Last updated: July 2026