Peptide side effects no one talks about BPC 157 headaches. TB 500 fatigue. CJC Ipamorelin water retention. Most people quit. But 90% of the time it's the protocol, not the peptide. BPC 157 Peptide Therapy: What Is It and What Are the Benefits?: Bio X Weight Loss Center: Weight Loss Centers BPC 157 for Muscle Growth: What You Need To Know Elive Health & Wellness Peptides are often well tolerated, but they can still cause temporary reactions while the body adapts. Some commonly reported effects include: BPC 157 headaches, nausea, increased appetite TB 500