is a b12 injection im Best Vitamin Site: Administering B12 Shots Treating Severe Vitamin B12 Deficiency

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BMC Med 11 , 97 (2013)

For over 60 years high dose vitamin B12 treatment has been used without any signs of the danger of an overdose

Indeed, most class II chelatases that insert metals into sirohydrochlorin appear to lack metal specificity and hence these enzymes will insert Fe(II), Ni(II) and Co(II) into the tetrapyrrole substrate [163]

Although it is not an FDA-approved formulation, hydroxocobalamin is recommended worldwide by the World Health Organization (WHO) as a drug of choice for the treatment of vitamin B12 deficiency

Can Fatty Liver Cause Elevated B12 in Blood Tests