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This can be due to a number of reasons, such as a lack of B12 in the diet, reduced stomach acidity, or when particular cells in the stomach - the "parietal" cells - do not produce enough intrinsic factor

Fox News April 16, 2026

If you experience any suspected side effects, report them to the MHRA Yellow Card Scheme (yellowcard.mhra.gov.uk)

Vitamin B12 injections may be more beneficial for those seeking an instant energy boost and help with specific medical conditions, such as anemia

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