Injectable peptides are the new antiageing trend. But what evidence do we have they're safe for humans? Medicine Today BPC 157 Benefits: What It Does for Gut, Joints, Muscle, and Recovery BPC 157 & The Gut Brain Axis: A Practitioner's Definitive Review of the Evidence Peptides like BPC 157, TB 500, and growth hormone secretagogues are increasingly marketed for recovery and injury healing., But what does the science actually say?, Most evidence comes from animal