IGF-1 LR3
Long-acting insulin-like growth factor.
Mechanism of Action
Promotes muscle cell hyperplasia.
Key Benefits
- Muscle hypertrophy
Common Uses
What to Expect
Onset
Muscle pumps and fullness within hours of first dose; hypertrophy effects build over 4–6 weeks
Duration
LR3 modification extends activity to 20–30 hours per dose; cycle 4–6 weeks for full results
What Users Report
- Intense muscle pumps during and after workouts — muscles feel 'full' and volumized
- A visible increase in muscle fullness and roundness within the first week
- Rapid strength gains that can be surprising in their speed
- Increased hunger as the body's growth demand rises
- Possible hypoglycemia symptoms if not eating properly — shakiness, dizziness, sweating (always eat around dosing)
- Significantly enhanced recovery — able to train more frequently with less accumulated fatigue
- Advanced users describe it as one of the most potent muscle-building peptides available
Typical Timeline
Hours 1–6: Intense muscle pumps and fullness. Days 1–7: Muscles appear visibly fuller; strength begins climbing. Weeks 2–4: Significant hypertrophy becomes apparent; strength gains accelerate. Weeks 4–6: Full cycle; best results with proper nutrition and training. Critical: Always have food available — monitor blood sugar carefully throughout.
Side Effects
- Hypoglycemia risk
Dosage Protocol
20–50 mcg subcutaneously post-workout (bilateral muscles). Cycles: 4–6 weeks on, 4 off. Monitor blood sugar.
Always consult a physician before starting any peptide protocol.
Administration
Injection
FDA Status
Research use
Stacks Well With
- CJC-1295/Ipamorelin
Tags
Related peptides
Ipamorelin
Selective ghrelin mimetic – safest GH peptide.
CJC-1295 (with/without DAC)
Growth Hormone Releasing Hormone analog
Long-acting GH secretagogue.
Sermorelin
Shortest functional GHRH analog.
GHRP-2
Ghrelin mimetic GH releaser.