Scared of needles? What science says about the peptide nasal sprays on the rise AOL Oral vs Injectable BPC 157: Differences, Benefits, and When to Use Eac Revolution Health & Wellness The Basics Behind BPC 157 Injections and Their Effectiveness Your Health Magazine Peptide Nasal Spray vs Injection: Delivery Methods Compared Have you used peptides? What are your thoughts? Let me know below Peptides are short chains of amino acids that play vital roles in cellular signaling and repair throughout the body.