IGF-1 LR3
ResearchIGF-1 LR3 (Long Arg3-IGF-1)
- Category
- Growth Hormone
- Aliases
- Long R3 IGF-1, Long-Arg3-IGF-1
- Administration
- Subcutaneous injection
Documented benefits
Tier 1 · Peer-reviewed / regulatoryBenefit categories
Growth Hormone
IGF-1 LR3's defining research application — a directly modified IGF-1 analog rather than a growth hormone-releasing secretagogue.
Muscle growth
Directly activates IGF-1 receptors, bypassing the growth hormone-release step used by other compounds in this category.
Fat loss
Its insulin-like activity supports metabolic effects, though it carries a distinct hypoglycemia risk unlike growth hormone secretagogues.