Longitudinal infusion of a complex of insulin like growth factor I and IGF binding protein 3 in five preterm infants: pharmacokinetics and short term safety Pediatric Research IGF 1 LR3: Nasal Spray vs. Subcutaneous Injection Comparison HGH vs IGF 1 LR3: Scientific Comparison & Research Guide LONGR3 IGF I Liquid Repligen QK041 Recombinant human bovine porcine IGF 1 LR3 protein Switched things up and have been using my IGF 1 LR3 30 mins pre workout and have been noticing longer lasting pumps and more vascularity so far! 2 more weeks until I cycle