bpc 157 derived from gastric juice peptide uses BPC-157 is one of the peptides that has been getting a BPC-157 | Lumera Labs
Description
Key B12 PFS 1500 mcg Injection 1 ml may cause side effects such as pain, itching, swelling or redness at the injection site, nausea, vomiting, diarrhoea, and headache

Journal of the American Geriatrics Society
Typical daily range: 50100 mg once daily subcutaneously (gradual titration from lower doses)

This suggests potential for halting Parkinsons progression rather than just preventing it
