For those focused specifically on muscle development, the peptide interaction with growth hormone receptors in fibroblasts suggests indirect support for muscle growth through improved connective tissue health
Curry, J
1) Targets Fat Metabolism (AOD 9604) Supports pathways commonly associated with: fat breakdown stubborn fat reduction support lean tissue protection during dieting 2) Supports Energy + Metabolic Flexibility (MOTS-c) Supports: mitochondrial energy production better fuel utilization (carbs + fats) metabolic resilience during stress, dieting, or busy seasons 3) Supports Visceral Fat + Midsection Goals (Tesamorelin) Supports: visceral fat reduction in certain individuals midsection-focused body composition goals metabolic pathway support under provider guidance 4) Supports Recovery + Sleep (Ipamorelin) Supports: deeper, more restorative sleep better recovery between workouts improved consistency (because you feel better while leaning out) In simple terms: AOD + MOTS-c help the metabolism feel on, Tesamorelin supports midsection/visceral fat goals, and Ipamorelin helps you recover and sleep so you can stay consistent

What matters far more than the exact route is whether you needed the injection in the first place, and whether the dose and schedule are right
Elevated NNMT activity has been associated with obesity, insulin resistance, and reduced metabolic efficiency
So the practical takeaway is not oral is better or SC is better. It is: pick one route, follow the documented per-dose figure for the vial you have, and keep the route constant so that whatever you observe is not confounded by a mid-stream route change