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This is typically 28 days from the date the vial was first punctured, or a specific date printed on the label
Side Effects and Safety Protocol of Vitamin B12 Vitamin B12 (cobalamin) is widely regarded as a safe, water-soluble nutrient with a low risk profile, owing to its efficient excretion of excess amounts via urine and its minimal toxicity at recommended doses
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Nevertheless, studies utilizing more specific biomarkers of vitamin B 12 status, including measures of holo-transcobalamin and methylmalonic acid, have shown more consistent results and a trend towards associations between poor vitamin B 12 status and faster cognitive decline and increased risk of Alzheimers disease (82-86)
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