The side effects of high vitamin B12 can vary, but might be present
The total cost: one wasted $80-150 vial plus a course of antibiotics
S, Gatterer L, Kriwan F, Abhishek M, Nandgaonkar H, Nandgaonkar S, Adedara AO, Haro JM, Gericke C, Neumann G, Akhtar A, Rashidlamir A, Thangavelu M, Ngoumou GB, Perpk , Klaper M, Bhattacharya B, Kirschner W, Bessems KMHH, Jones P, Peoples G, Bescos R, Duftner C and Seifert G (2025) Toward a roadmap for addressing today's health dilemmaThe 101-statement consensus report
Because B12 is water-soluble, the NIH Office of Dietary Supplements notes that no tolerable upper intake level has been established excess B12 is excreted by the body rather than accumulating to toxic levels
Always consult with a healthcare professional to determine if MIC B12 injections are appropriate for your specific needs and health goals