IGF-1 LR3 Research Guide

Full name: Insulin-like Growth Factor-1 Long R3

A modified IGF-1 with R3 substitution and N-terminal extension reducing IGFBP binding, increasing half-life and potency 2-3x over native IGF-1.

How IGF-1 LR3 Works

Activates IGF-1R while evading IGFBP sequestration. Triggers PI3K/Akt/mTOR for protein synthesis, satellite cell proliferation, and amino acid uptake into muscle.

Dosing Protocol

• Typical dose: 20-50 mcg
• Frequency: Daily (post-workout)
• Duration: 4-6 weeks
• Route: Subcutaneous or intramuscular injection

Reported Benefits

• Potent anabolic effects
• Hyperplasia (new muscle cells)
• Extended half-life
• Enhanced recovery
• Improved nutrient partitioning
• Satellite cell activation

Potential Side Effects

• Hypoglycemia risk
• Gut growth (prolonged)
• Joint pain
• Tumor promotion (theoretical)
• Water retention

Research Citations

1. IGF-1 LR3 pharmacokinetics and muscle anabolism (2020) - LR3 modification increased bioactivity 300% with proportional protein synthesis increases.
2. Local IGF-1 for muscle hypertrophy (2019) - Site-specific injection produced 15% greater hypertrophy via satellite cell activation.

Related Muscle Growth Compounds

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