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Because cyanocobalamin is cheap to produce, its typically used in vitamin B12-fortified foods and is the most commonly supplemented form of vitamin B12

Newer standards suggests that goals should emphasize functional, patient-reported outcomes

Your optimal dose will depend on your baseline hemoglobin, serum iron and ferritin levels

Absorption Mechanisms and Biological Differences The absorption of vitamin B12 from tablets takes place mainly in the terminal ileum and relies on intrinsic factor, a glycoprotein synthesised by gastric parietal cells

[PubMed Citation] Borron SW, Baud FJ

Unlike vitamins A, D, E, and K which are stored in fat, B vitamins are water soluble and not stored in large quantities