Catalog2 refs
IGF-1 LR3 (Long R3 IGF-1)
Muscle & PerformanceResearch use only
Educational use only. Not medical advice. Verify all information with primary sources and a licensed clinician before use.
Body Map
MusclesJointsSkin
Overview
IGF-1 LR3 is a synthetic 83-amino acid analog of insulin-like growth factor-1 that has never been approved for human use. The N-terminal extension and R3 substitution reduce binding protein interaction, maintaining elevated free circulating levels with ~3x greater potency than native IGF-1.
Primary Uses
Muscle Growth
Hypertrophy
Anti-Catabolic
Hyperplasia
Wound Healing
Ligament/Tendon Recovery
Nutrient Partitioning
Fat Loss
Protocol Reference
Dose
20-100 mcg daily (start low at 20-30 mcg)
Frequency
Once daily, or split AM/PM for higher doses
Half-life
20-30 hours
Route
Subcutaneous · Intramuscular
Evidence
limited
Research Models
RatSheep
Also in Muscle & Performance