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Bottom line Existing evidence comparing oral with IM vitamin B12 is suboptimal
B12 can contribute to all three
Privacy: Some individuals prefer the privacy of self-administering B12 injections rather than having them done in a clinical setting
Multiple strengths are available as separate variants: 2 mg per vial , 5 mg per vial and 10 mg per vial
Understanding your options and what to expect Delivery timing and how the process works General questions before you decide Causes of High B12 Levels Elevated serum B12 levels can result from various medical conditions and external factors
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