Unlike standard IGF1, the LR3 version has two key modifications that enhance its potency and duration: The Long designation refers to an additional 13 amino acids, increasing its molecular stability The Arg3 substitution reduces its binding to IGF-binding proteins (IGFBPs), extending half-life from minutes to ~2030 hours These changes allow IGF1 LR3 to remain active in the bloodstream much longer than endogenous IGF1, resulting in greater anabolic signaling and sustained muscle growth potential
Peer-reviewed clinical literature indexed in PubMed and PubMed Central was searched with terms including: microneedling, microinfusion, percutaneous collagen induction therapy, transdermal drug delivery, hollow microneedle, GHK-Cu, copper tripeptide, Acetyl Hexapeptide-8, Argireline, polydeoxyribonucleotide, PDRN, epidermal growth factor, rhEGF, sh-Oligopeptide-1, hyaluronic acid molecular weight, niacinamide, Centella asiatica, AquaGold, mesotherapy
B., Phielix, E., & Schrauwen, P
GHK-Cu: The Ultimate Skin Regenerator & Collagen Booster GHK-Cu, often called a 'copper peptide,' is my absolute favorite for promoting youthful, resilient skin
see section by Manto and Oulad Ben Taib)
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