Injectable vitamin B12, which can treat significant deficiencies, can cause the following common side effects: mild diarrhea Itching headache dizziness nausea vomiting hot flashes More serious side effects of vitamin B12 injections may include: Irregular heartbeat Heart palpitations Hives or skin rash In rare cases, it can cause severe allergic reactions or anaphylaxis
[DOI] [PubMed] [Google Scholar] 112.Perestrelo R., Silva P., Porto-Figueira P., Pereira J.A., Silva C., Medina S., Cmara J.S
10.1186/s13059-014-0550-8 34 MiaoY.SunY.WangW.DuB.XiaoS
By day four, the morning stiffness had dropped noticeably
BPC 157 Peptide Side Effects: What to Know Even with a relatively favorable tolerability profile in reports, side effects can occur, and any decision to use BPC-157 should be based on awareness of them