For most research applications, especially those focused on gut health, administering oral BPC-157 on an empty stomach is recommended
CSF examination also shows elevated lactate levels in addition to low homovanillic acid (HVA), along with high levels of 3-O-methyldopa, levodopa, and 5-hydroxytryptophan, suggesting the dysfunction of aromatic L-amino acid decarboxylase (AADC)
These include modulations in gene expression, stimulation of the endocannabinoid system, and action on the central nervous system
Food and Drug Administration has identified certain bulk drug substances used in compounding as substances that may present significant safety risks, and BPC-157 has been discussed in that regulatory context
Also, sadly enough, there also are many types of (chronic) diseases that require B12 injections, such as Pernicious Anemia, people with Crohns, celiac, and people with intestinal imbalances, such as intestinal tapeworms and excessive bacterial growth
Good luck.