Tag: oral supplementation

Diagram showing vitamin B12 absorption via intrinsic factor and passive diffusion pathways
Clinical UpdatesExplainersPerspectivesPractice

How vitamin B12 absorption works: two competing pathways explain why high-dose pills can rival injections

Vitamin B12 is absorbed via two pathways: intrinsic factor, which saturates at 1.5 µg per dose, and passive intestinal diffusion,…

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