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The most common reason someone would need to have their vitamin B12 levels checked is to evaluate for vitamin B12 deficiency, says Mike Ren, MD, assistant professor of family and community medicine at Baylor College of Medicine
Cyanocobalamin injection is commonly used for vitamin B12 deficiency related to pernicious anemia, dietary deficiency, gastrointestinal conditions, or surgeries that reduce absorption
You should be able to access a test for free on the NHS if you qualify for NHS care
Researchers often check CVS, Walgreens, and local pharmacies for Bac Water, but 30mL multi-dose vials are rarely stocked over the counter and usually require a clinical prescription
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