bpc-157 promotes gut healing is one of the peptides that has been getting a lot of attention recently. It is a synthetic peptide derived from a protein found in human gastric juice. In experimental research BPC-157 for Gut Healing: Ulcers,
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Deficiency of vitamin B12 can result in neurologic, cognitive, and hematologic manifestations, most notably peripheral neuropathy, cognitive impairment, and macrocytic anemia

doi: 10.1016/j.rbmo.2018.05.017
the BPC-157 and TB-500 amounts follow along at roughly one-fifth of the GHK-Cu mass each