what is b12 injection given for How to Give a Injection: Step-By-Step Instructions Vitamin B12 Injection - Skin
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Injection each week for 3-6 weeks, then monthly or 2 monthly depending on individual patient needs

95% CI, 0.82-0.99) (33)

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Animal-based foods contain the highest amount of vitamin B12, this is why vegans and vegetarians are often at risk of developing a deficiency
