Subcutaneous Injection Sites and Instructions for Safe Self Administration Delta Sleep Inducing Peptide an overview ScienceDirect Topics Peptide Therapy for Better Sleep, Focus and Fantastic Energy The U.S. Food and Drug Administration is moving toward allowing compounding pharmacies to produce more than a dozen injectable peptides that were banned because of potentially significant safety risks, the New York Still injecting in the same spot every time? Read this. Where you inject your peptides can actually affect absorption, comfort, and results. Quick guide: Abdomen: fastest absorption Upper arms