post b12 injections Inflammatory papules and pustules on the chest after injection B12 Injections: Who Should Get
Description
This looks for blocking or binding autoantibodies in the blood

and today LE considers that unusual

Metformin can interfere with the absorption of vitamin B12 in the small intestine, leading to lower B12 levels over time

[DOI] [PubMed] [Google Scholar] 23.Cao J., Xu S., Liu C

Any website or seller offering B12 vials without a prescription is breaking the law and, frankly, putting your health on the line
