IGF-1 LR3
A modified analog of Insulin-like Growth Factor 1 engineered for a longer half-life (~20–30 hours vs. 15 min for native IGF-1). Reported for dramatic muscle growth, enhanced recovery, nutrient partitioning, and fat loss.
People use this for
Benefit Profile
IGF-1 LR3's fingerprint across categories
Community Interest
Report volume over 12 months
Reported Benefits
3 of 3Muscle Growth & Hypertrophy
Strongly Positive"Added 8 lbs of lean mass in 6 weeks on IGF-1 LR3. Strength went through the roof. This stuff is the real deal for muscle growth."
Enhanced Recovery
Strongly Positive"Recovery between sessions is noticeably faster. Can train harder and more frequently without the usual fatigue."
Fat Loss via Nutrient Partitioning
Positive"The nutrient partitioning effect is real. Eating at maintenance but getting leaner while adding muscle. Body comp changing weekly."
Reported Side Effects
Blood sugar drops reported, especially post-injection. Carry fast carbs.
Some bloating and water retention, typically subsides.
Temporary joint stiffness reported by some users.
Dosing Patterns
Most Popular: SubQ at 20-80 mcg
70% of community members report using this dosing protocol 1x daily. Individual responses vary — start low and adjust based on your experience.
Commonly Stacked With
Frequently Asked
IGF-1 LR3 is a modified version of IGF-1 with a longer half-life. It directly stimulates muscle cell growth independent of growth hormone. Requires cycling due to receptor desensitization risk. Banned by WADA.