Where to Inject BPC 157 for Erectile Dysfunction: Practical Considerations and Evidence Gaps Subcutaneous Injection Sites and Instructions for Safe Self Administration Understanding Peptide Injection Techniques for Pain Management Where to Inject BPC 157 for Erectile Dysfunction And the BPC 157 TB 500 journey begins. Injection 1 of 30 into my body. Im excited to see how my body feels in the coming weeks. Was more nervous for this injection than Ive been doing flips from