BPC 157 & TB 500: What You Need to Know How necessary is the local injection site when adminstering BPC157 , In the video, I break down exactly how to use it and why both local and systemic injection can have benefits, Watch carefully Subcutaneous Injection Sites and Instructions for Safe Self Administration 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.