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Levels are based on complexity of history, examination and medical decisionmaking rather than time
These factors collectively suggest that the conclusions, while robust, should be interpreted with caution in clinical decision-making
This means vegetarians and vegans are at a high risk of not getting enough each day
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This pattern aligns with B12 pharmacokinetics: serum levels peak 8-12 hours post-injection, tissue saturation occurs over 48-72 hours (Andrs et al., Journal of Blood Medicine , 2018)
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