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 Semaglutide: Uses, Side Effects, Brands, and Dosages BPC 157 benefits, dosage, and side effects Retatrutide Injection: Package Insert Prescribing Info Peptides: Amputations, heart attacks, days of vomiting: The horror toll of 'backyard' peptides Peptide Dosing Cheat Sheet Etsy