case report bpc-157 adverse event Regeneration or Risk? A Narrative Review of for Musculoskeletal Healing BPC-157: Miracle Healing Peptide or
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doi: 10.1182/bloodadvances.2024013212 79 Carretero-IglesiaLHallOJBerretJPaisDEstoppeyCChimenMet al

Vitamin B12, or cobalamin, is key for many body functions

They are not interchangeable unless specifically indicated by research protocols
Youre deep into a research protocol

Not even a single case could be found in some populations where more traditional diets are eaten (i.e., minimally processed, high-carb, low-fat diets)