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Causes and Risk Factors Some of the main causes and risk factors for vitamin B12 deficiency include: Vegetarian and Vegan Diets: Individuals following these diets may not consume enough animal products that are rich in vitamin B12
So, when picking between them, it really comes down to your preferences and what your doc recommends
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[DOI] [PubMed] [Google Scholar] 121.Hsieh M.J., Lee C.H., Chueh H.Y., Chang G.J., Huang H.Y., Lin Y., Pang J.S