What Is IGF-1 LR3?
IGF-1 LR3 (Long R3 Insulin Like Growth Factor 1) is a modified analog of IGF-1 engineered to extend half life and reduce binding to IGF binding proteins (IGFBPs). This design is discussed as increasing bioavailability and prolonging IGF-1 receptor signaling compared with native IGF-1, which is why it is often studied in anabolic, recovery, and tissue repair research contexts.
Mechanisms of Action
• Bind IGF-1 receptors, driving anabolic and repair related signaling across muscle and connective tissue models
• Reduce IGFBP binding, increasing free fraction availability and extending duration of effect
• Increase protein synthesis signaling and support muscle hypertrophy endpoints
• Extend the anabolic window by maintaining IGF-1 receptor activation over a longer exposure period
Benefits
• Lean mass and muscle growth related endpoints through sustained anabolic signaling
• Faster recovery signals and improved tissue repair related outcomes in some models
• Body composition improvements through increased lipolysis signals while preserving lean tissue
• Connective tissue and joint support endpoints relevant to injury recovery paradigms
Dosing
Strength | Dose |
|---|---|
Low | 20 mcg per day |
Medium | 40 to 60 mcg per day |
High | 80 to 100 mcg per day |
Utilized in 4 to 6 week cycles followed by a break period to reduce desensitization related concerns.
Acetic Acid 0.6% Solution is recommended for reconstitution
Safety Profile
IGF-1 LR3 is a high potency compound that warrants conservative handling and close monitoring.
Potential side effects include:
• Hypoglycemia risk signals due to insulin like activity
• Water retention or mild swelling at higher exposures
• Joint pain or discomfort signals in some contexts
• Organ growth related concerns with prolonged systemic IGF-1 activity
• Potential receptor desensitization signaling with extended use, which is why cycling is commonly emphasized
Stacking
Muscle Growth Stack
IGF-1 LR3
HGH
or CJC-1295 (No DAC)/Ipamorelin
or Tesamorelin/Ipamorelin
or MK-677
Recovery & Injury Healing Stack
IGF-1 LR3
BPC-157 + TB-500
HGH or CJC-1295 (No DAC)/Ipamorelin or Tesamorelin/Ipamorelin
Glutathione
Disclaimer: The information provided is intended solely for educational purposes and should not be considered a replacement for professional medical advice. All compounds referenced are not for human consumption.
