Muscles are most sensitive to growth signals after training. IGF 1 LR3 drives nutrients into muscle cells, boosts protein synthesis and recovery. Triggers muscle growth pathways, and helps nutrients The mighty protein: insulin like growth factor type 1 The Physiological Society Insulin like growth factor 1 deficiency and metabolic syndrome Journal of Translational Medicine Springer Nature Link IGF 1 LR3 Peptides Collective IGF 1 LR3 100mcg 1mg Peptide Bulk Supply