pharma grade bpc 157 BPC-157 BPC-157 - Research Grade Peptide
Description
Therefore, vitamin B12 should only be injected by a health care professional who is prepared to provide first aid immediately

This injection reduces the inflammation squeezing the nerve, while the anesthetic provides immediate comfort

doi: 10.1369/jhc.2009.953539

If your B12 deficiency is due to an autoimmune disease or something that's not related to diet, you may need to get injections every two or three months for the rest of your life
