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 TB 500 vs BPC 157: Comprehensive comparison of healing peptides 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. Peptide BPC 157 Does It Work? Breaking Down the Evidence and the Hype BPC 157 and TB 500: The Ultima The Peptide Effect Apple Podcasts What do we know about 'research only' peptides? Q&A with expert Stuart Phillips McMaster News