IGF-1 LR3
Reviewed by Fat Man in the Arena · Updated March 2026
Key Takeaway
IGF-1 LR3 is a modified version of insulin-like growth factor 1 with a longer half-life, promoting muscle growth and recovery.
How it works
Binds to IGF-1 receptors to promote protein synthesis, cell growth, and inhibit cell death. The LR3 modification extends half-life from minutes to 20-30 hours.
Benefits
- Enhanced muscle growth
- Improved recovery
- Cell proliferation
Side effects
- Hypoglycemia risk
- Joint pain
- Organ growth concerns with prolonged use
Dosing protocol
Typical Dose
20-50 mcg daily
Frequency
Once daily
Cycle Length
4-6 weeks
Use with caution. Monitor blood sugar.
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Medical Disclaimer: This content is for informational and educational purposes only. It is not intended as medical advice or a substitute for professional medical consultation, diagnosis, or treatment. Always consult a qualified healthcare provider before starting any peptide protocol.