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VidalAlaball J, Butler C, CanningsJohn R, Goringe A, Hood K, McCaddon A, McDowell I, Papaioannou A
Sealed vials during travel: Unopened product is more forgiving
An endoscopy can reveal conditions like atrophic gastritis that might be causing Vitamin B12 malabsorption
Some common side effects may include headache, nausea, runny nose, mild irritation in the nose, or dizziness
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