how to repair nerve damage from a b12 injection Vitamin Deficiency & Problems : What You Must Know How Fast Does a Vitamin
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[DOI] [PubMed] [Google Scholar] 65.Hou X, Xu S, Maitland-Toolan KA, Sato K, Jiang B, Ido Y, et al

This means that it is not possible to overdose on vitamin B12, and as far as we know there is no upper limit on the amount of B12 that can be taken safely by an otherwise healthy person

Doctors usually focus on treating the root cause rather than the elevated B12 itself

Effects of moderate alcohol consumption on folate and vitamin B(12) status in postmenopausal women
