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Because an "intrinsic factor" is needed for B 12 to be absorbed, its lack causes a vitamin B 12 deficiency

Another study that analyzed data from 7,017 NHANES participants found higher intakes of B6 and folate were each independently associated with a lower risk of severe headaches or migraines, and high intake of both B vitamins was linked to the lowest risk (Tian 2024)

It's important to note that patients should never attempt to transfer medication from prefilled pens into syringes or other containers, as this can compromise sterility, accuracy, and medication stability

What are the signs of vitamin B12 deficiency