marek health bpc-157 Diagnostics A Peptide People Miss, BPC-157
Description
doi: 10.1093/brain/awn193
Vitamin Injections are typically given for and are very effective at raising blood levels of B12 and inhibiting or reversing a vitamin/nutrient deficiency

BPC-157 may influence some of those signals, but that is not the same as proven healing

No, it helps memory
At present, there are no attempts to regenerate nerves with however, here it would probably be useful to work with injections