While most men tolerate B12 well, those with Lebers disease (a rare genetic eye disorder) should avoid injections, as high doses of B12 may worsen symptoms
As mentioned, current BPC 157 research has been carried out on animals, and only small-scale human trials have been done
Fadilah NIM, Maarof M, Motta A, Tabata Y, Fauzi MB
Each vial contains sterile water with 0.9% benzyl alcohol to help inhibit microbial growth during repeated laboratory handling under appropriate sterile conditions
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PMC 7355602