can i buy b12 injections over the counter Compounded Cyanocobalamin (Vitamin B12) Injection tells the Mayo Clinic Neurobion Forte Vitamin B12 Methylcobalamin
Description
This can be particularly beneficial for individuals with absorption issues or those needing a quick energy boost

10.1016/j.abb.2014.08.017 158 XuW.HouL.LiP.LiL

Im on my 3rd month

This is in direct conflict with the lived experience of patients who feel their symptoms returning as the effects of the last injection wane

So, the answer is no, you can not overdose on B12 vitamins