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After ingestion, stomach acid separates B12 from food proteins, and then intrinsic factor produced in the stomach lining binds to B12 so it can be absorbed in the ileum (the final section of the small intestine)
Immune Function: Both vitamin B12 and D support the body's natural defense mechanism, which helps fight against infections
The NHS adult daily requirement is 1.5 micrograms a day, which a normal mixed diet covers easily and stores in the liver for years
While some effects are noticeable immediately, others provide long-term benefits over weeks or months
If your dietary sources are insufficient, you may consider supplements, such as pills or injections, depending on the cause of the deficiency
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