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Allergies If you are allergic to cobalt, you should not take vitamin B12, as vitamin B12 contains a cobalt molecule
For severe deficiency, clinicians typically prescribe loading doses daily or every other day for one to two weeks followed by monthly maintenance injections
Foods that are high in vitamin B12 include
doi:10.1038/sj.ijo.0801740
Instead, they are usually given in concentrated doses of 1,000 mcg (1 mg)
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