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Description
The injection is providing you with the necessary B vitamins regardless of your food intake, which is helpful especially if you have trouble eating a balanced diet (due to illness or other reasons)

They are only available for a prescription if the patient has been tested and shows low levels of vitamin B12
Choice depends on the patients goals and health profile

One exception to the injectable formulations is semaglutide (Rybelsus), which is available as an oral tablet
Methylmalonic acid and homocysteine as indicators of vitamin B-12 deficiency in cancer
