There are a few different ways you can take vitamin B12, and their effectiveness varies depending on which method you use
For a 70 kg individual, this translates to approximately 1.75-28 mg per dose, though standard therapeutic protocols use significantly lower daily doses
[24] Cyanocobalamin is one of the most widely manufactured vitamers in the vitamin B 12 family (the family of chemicals that function as B 12 when put into the body), because cyanocobalamin is the most air-stable of the B 12 forms, [25] and is the easiest to purify after it is produced by bacterial fermentation
Maruvada P, Stover PJ, Mason JB, Bailey RL, Davis CD, Field MS, Finnell RH, Garza C, Green R, Gueant JL et al