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How to Run IGF-1 LR3 Cycle: Dosing vs Receptor Sensitivity Comparison

The table below compares different IGF-1 LR3 cycle structures based on dosing frequency, cycle duration, and receptor sensitivity outcomes: Conservative Split-Dose 40–60 mcg Twice daily (AM + post-training) 4 weeks Low. Split dosing prevents sustained receptor

This comparison does not assign a generated winner or score.

  • The table below compares different IGF-1 LR3 cycle structures based on dosing frequency, cycle duration, and receptor sensitivity outcomes:
  • Conservative Split-Dose
  • 40–60 mcg
  • Twice daily (AM + post-training)
  • 4 weeks
  • Low. Split dosing prevents sustained receptor saturation
  • Recommended for first-time users; balances anabolic signaling with receptor preservation
  • Standard Split-Dose
  • 60–80 mcg
  • 4–6 weeks
  • 6 weeks
  • Moderate. Higher dose increases cumulative receptor occupancy
  • Suitable for experienced users; requires strict off-period discipline
  • Single Daily Dose
  • Once daily (post-training)
  • Moderate-High. Continuous high-level receptor binding accelerates desensitization
  • Not recommended; single bolus creates prolonged receptor saturation
  • Extended Continuous
  • Twice daily
  • 8+ weeks
  • Variable or none
  • Very High. Receptor density significantly reduced by week 6–8 regardless of dose adjustments
  • Hard reject; diminishing returns after 6 weeks make extended cycles counterproductive
  • Pulse Dosing (training days only)
  • Training days only (4–5×/week)
  • Low-Moderate. Intermittent exposure theoretically reduces cumulative receptor load
  • Mixed evidence; 20–30 hour half-life means significant overlap between doses
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