B12 supplements come in multiple forms, one being an over the counter orally ingested pill
Symptoms of a Vitamin B-Complex Deficiency Vitamin B12 deficiency can cause a variety of symptoms, and they can vary depending on the severity and duration of the deficiency
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Archived from the original on 16 January 2017
This can increase your need for B12 supplementation, and injections may be especially helpful in these cases