QK041 Recombinant human bovine porcine IGF 1 LR3 protein Recombinant Human LR3 IGF I IGF 1 GMP Protein, CF 8335D GMP: R&D Systems Just over a year apart with 2 preps in between : r bodybuilding Gut derived IL 13 contributes to growth via promoting hepatic IGF 1 production Microbiome Springer Nature Link IGF 1: Miracle Hormone or Health Hazard? Diet vs Disease Awesome results this year igf 1 lr3 ,cyp,e,primo then adding tren for 2 months then removed primo and tren added FTPP and diaing diet with labs and results hopefully helps : r Peptides