Insulin like Growth Factor 1 (IGF 1) in Hair Regeneration: Mechanistic Pathways and Therapeutic Potential IGF 1 LR3 The Muscle Building Peptide Everyone's Talking About IGF 1 LR3 is one of the most powerful performance peptides used for muscle growth, recovery, and fat loss. It's a modified version Recombinant human IGF 1 LR3 protein (Qk041) Qkine Frontiers Sheep recombinant IGF 1 promotes organ specific growth in fetal sheep Recombinant expression of IGF 1 and LR3 IGF 1 fused with xylanase in Pichia pastoris Applied Microbiology and Biotechnology Springer Nature Link