One possible explanation is that low serum vitamin B12 levels would trap folate as 5-methyltetrahydrofolate, prevent the generation of methionine from homocysteine, and therefore reduce protein synthesis and lean tissue deposition
Does BPC-157 work for tendon, ligament, and gut healing
In summary, both direct design relying on mechanistic knowledge and available structural data from the oxytocinase subfamily of M1 aminopeptidases as well as iterative manipulations of the parent peptide Ang IV, involving insertion of unnatural amino acids as -amino acids, macrocyclizations and various structural simplifications have provided highly potent selective Ang IV peptidemimetics inhibiting IRAP
Krivic, A., Anic, T., Seiwerth, S., Huljev, D., & Sikiric, P