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. What do we know about 'research only' peptides? Q&A with expert Stuart Phillips McMaster News Peptide BPC 157 Does It Work? Breaking Down the Evidence and the Hype Is BPC 157 Banned? Oral vs. Injectable Forms Explained 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.