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Are Vegans and Vegetarians at Risk
Some researchers report success with single-freeze protocols (reconstituting, aliquoting into single-dose volumes, and freezing once), but this is not standard practice and may affect potency unpredictably
The NIH recommends that adults over fifty years take a daily vitamin B12 supplement, or that they eat foods fortified with vitamin B12
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Choice of formulation is therefore guided mostly by clinical goals, availability and cost
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