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 What is BPC 157 and How Can It Benefit You? Le Jolie Med Spa Therapeutic effect of the BPC 157 peptide in treating the consequences Synthagen PL BPC 157 penis growth: What the evidence and real world experience actually show