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It is a partial sequence of a larger protein called BPC, which is present in gastric secretions at nanogram-per-milliliter concentrations 1

However it is advisable to deliver Vit B12 dose by a deep Intramuscular injection in gluteal or deltoid muscle Alternatively, you can also use oral Vitamin 12 tablets available at most health food stores and pharmacies

PubMed,

While some studies suggest benefits, human trials are still lacking

These potential benefits make it a compound of interest beyond pure metabolic applications

When levels are too low (leading to poor blood flow and stiffness), BPC-157 helps boost them up