What gauge of needle is used for intra articular injection of BPC 157 (Body Protection Compound 157) into the shoulder joint? BPC 157 Peptide for Weight Loss & Healing Sherman Oaks Clinic Buy Nationwide hCG Injections, GLP 1, GLP 1 GIP, B12 Fred Let the bio hacking begin. Just got my first injection of BPC 157 and TB 500 peptides in my left shoulder. Having already had a blown up right shoulder and surgery (which Just ordered the bpc157 and tb500 mix for this lingering shoulder injury I've had for about 6 months. What's the best way to inject it and how often?