I've been using Pentadecapeptide (PDA) and the results have been unreal. this peptide is almost identical to BPC 157 with the exception of an additional marginate salt, which has contributed to Revolutionizing Recovery: How Dr. Lundquist is Using BPC 157, TB 500, and Regenerative Therapies to Accelerate Healing Active Life Pain Center BPC 157 Superior Peptide How to relieve shoulder pain? Steroid injections are often used to treat shoulder pain caused by inflammation like bursitis, tendonitis, or rotator cuff irritation. The medication is injected