IGF-1 LR3
IGF-1 LR3 is a growth factor peptide used in evidence-based, physician-supervised protocols. Use for muscle development, recovery, body recomposition.
What is IGF-1 LR3?
Long-chain IGF-1 analogue with Arg3 substitution and 13-AA N-terminal extension. Reduced IGFBP binding (3-4x longer half-life than native IGF-1). Binds IGF-1R to promote muscle protein synthesis, satellite cell activation, and systemic anabolic signaling. Lower dose range option. Administer after meal or before gym session.
Uses & clinical decision logic
Use for muscle development, recovery, body recomposition. Lower dose vial for conservative protocols or new users.
IGF-1 LR3 dosage & administration
| Vial size | BAC water | Dosing range | Units / dose | Frequency | Route |
|---|---|---|---|---|---|
| 0.1mg | 1mL | 20-50mcg | 20-50 units | 5 days on / 2 off | IM |
| 1mg | 1mL | 100-200mcg | 10-20 units | 5 days on / 2 off | IM |
Safety & contraindications
May cause hypoglycemia — inject with or after food. Avoid in insulin-dependent diabetics without glucose monitoring. Monitor for acromegaly symptoms at high doses.
Stacking & combinations
Combines with GH peptides for GH + IGF-1 synergy; pairs with Follistatin 344 and MGF for muscle development protocol.
Related peptides
Frequently asked questions
What is IGF-1 LR3 used for?
Use for muscle development, recovery, body recomposition. Lower dose vial for conservative protocols or new users.
What is the typical IGF-1 LR3 dosage?
Common dosing ranges from 20-50mcg (5 days on / 2 off, IM). Exact dosing is individualized and set by a licensed physician.
How is IGF-1 LR3 administered?
IGF-1 LR3 is typically administered via IM.
What are the contraindications for IGF-1 LR3?
May cause hypoglycemia — inject with or after food. Avoid in insulin-dependent diabetics without glucose monitoring. Monitor for acromegaly symptoms at high doses.
Build a physician-supervised protocol around your goal — no gatekeeping, real doctors, 503A compounding pharmacies.
Build your protocol →This page is for educational purposes only and is not medical advice. Peptide therapies described here are provided under physician supervision through 503A compounding pharmacies. Many peptides are not FDA-approved for the uses described. Do not start, stop, or change any protocol without consulting a licensed physician.