im injection vitamin b12 Best Site: Administering B12 Shots How to Give a B12

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Chronic treatment should be with an oral B 12 preparation

How Storage Practices Affect Research Results Stable storage conditions protect chemical integrity

For maximum benefit, it is recommended to have one injection per week for 4 weeks, then maintain with one injection every 3 months

More on this: Vegan and vegetarian sources of B12 To diagnose a vitamin B12 deficiency, doctors A doctor may order blood tests if they suspect a person has a vitamin B12 deficiency, including a complete blood count and tests to check levels of B12 and folate in the blood

Further Reading For additional peer-reviewed research, see: NNMT inhibitor preclinical study by Neelakantan et al