Can peptides like sermorelin, IGF 1 LR3, and GHS boost muscle growth? Maybe. Are they safe? We don't know. These compounds boost natural growth hormone (GH) and IGF 1 levels, key drivers of muscle Insulin like Growth Factor 1 (IGF 1) in Hair Regeneration: Mechanistic Pathways and Therapeutic Potential IGF 1 LR3 Peptide Muscle Building, Recovery & Fat Loss Explained 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