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This deficiency can be caused by poor dietary consumption, a breakdown in the digestive process, or from taking certain medications that make it difficult to absorb B12 (such as antacids)
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This is not a minor rounding issue
After 28 days, the efficacy of the benzyl alcohol preservative can no longer be guaranteed, which significantly increases the risk of contamination and compromised research
Intravenous B12 Administration Guidelines For those needing quick Vitamin B12, IV shots are a fast and effective way
doi: 10.1016/S1474-4422(05)70023-5 68 GiovannoniG.HawkesC
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