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Whiteman, M., Tritschler, H
Dietary sources of B12 are almost exclusively animal-derived and include: Meat and poultry Fish and shellfish Dairy products and eggs Fortified foods such as certain breakfast cereals and plant-based milks B12 is absorbed in the small intestine with the help of a protein called intrinsic factor , produced by the stomach lining
The disconnect between product concentrations and biological effective doses matters for practical reasons
ISBN 978-0-12-811803-0
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