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A 2025 European Journal of Clinical Nutrition commentary on the NICE guideline argued that the diagnostic threshold and clinical awareness still need to be tightened further, especially around pernicious anaemia, which is still under-recognised in primary care
Lock your desired draw to a round number, such as 10 units (0.1 mL), 25 units (0.25 mL) or 50 units (0.5 mL)
It is not the same system used to approve and market a manufactured drug at national scale
Insurance coverage varies widely
Lifestyle: Are you getting enough sleep and movement
Vitamin B12 is water-soluble, and the body can efficiently excrete excess amounts through urine
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