Receptor Grade IGF 1 LR3 for Sale (100mcg) Core Peptides muscle hardness (dense, dry, grainy look), you want peptides that improve GH release, IGF 1 activity, recovery, and nutrient partitioningnot just bulk size., Here are the 3 best peptides for muscle Systemic administration of monovalent follistatin like 3 Fc fusion protein increases muscle mass in mice ScienceDirect 3 most overhyped peptides that people often think are good. I think things like follistatin, peg mgf and aod people know are trash so its not really worth mentioning haha