What Is BPC 157? A Medical Clinic's Guide to the Body Protective Peptide, Its Uses, and What It Actually Does Perfect B PT 141 Nasal Spray vs Injection: What's the Real Difference? 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. You may have seen headlines claiming a new peptide nasal spray can reverse Alzheimer's brain damage and restore memories. As a physician, I want to slow that down and put it in