IGF 1 LR3: Nasal Spray vs. Subcutaneous Injection Comparison 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 Gut derived IL 13 contributes to growth via promoting hepatic IGF 1 production Microbiome Springer Nature Link Before & After 3 years apart. The gym hasn't just changed my appearance, it's changed everything. I'm very thankful I found it (and this sub!) : r veganfitness Gut derived IL 13 contributes to growth via promoting hepatic IGF 1 production Microbiome Springer Nature Link