BPC 157 and TB 500: Uses and Safety ConsumerLab.com People are turning themselves into lab rats': the injectable peptides craze sweeping the US Well actually The Guardian 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 BPC 157: What you need to know before you try it You are hearing more about BPC 157. Patients ask about it daily. Here are the most common questions answered. What is BPC 157? BPC 157