IGF-1 LR3 / DES(1-3)IGF-1 (IGF-1 LR3, Long-R3 IGF-1) — Research Compounds Library | RetatrutideCompare

Modified insulin-like growth factor-1 analogs with reduced binding to IGFBPs, giving prolonged systemic activity (LR3) or higher receptor affinity (DES). Used as cell-culture reagents; no human medical use.