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 The Stable Gastric Pentadecapeptide BPC 157 Pleiotropic Beneficial Activity and Its Possible Relations with Neurotransmitter Activity The Human Lab Rats Injecting Themselves with Peptides Office for Science and Society McGill University Is BPC 157 Peptide Safe? All Risks and Benefits Best HGH Doctors