IGF-1 LR3 (Insulin-Like Growth Factor-1 Long Arg3) is a modified analog of naturally occurring IGF-1 that has been engineered to deliver enhanced biological stability and extended activity in controlled laboratory environments. Due to its prolonged half-life and reduced binding affinity to IGF-binding proteins, IGF-1 LR3 has become a widely studied research peptide in investigations focused on cellular growth signaling, protein synthesis, tissue repair mechanisms, and metabolic pathway regulation. At Peptide Hubs, IGF-1 LR3 is supplied in a highly refined 99% purity formulation, produced under stringent laboratory standards to ensure molecular consistency, reliability, and reproducibility for advanced scientific research.