Research effects
Insulin-like growth factor-1 LR3 (IGF-1 LR3) is a long-acting analogue of IGF-1, engineered by substituting arginine for glutamic acid at position 3 and extending the N-terminal sequence by 13 amino acids, resulting in significantly enhanced biological activity. This peptide demonstrates potent effects in promoting muscle hypertrophy, increasing lean body mass, and accelerating tissue repair, with users reporting effective muscle growth and recovery. In preclinical studies, IGF-1 LR3 has been shown to stimulate proliferation and differentiation of multiple cell types and demonstrate potential in improving functional recovery following nerve injury.
