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Vitamin B12 is absorbed from food in the terminal ileum (the last part of the small intestine)
Beyond-use window: reconstituted solution has a limited stable life (commonly a few weeks refrigerated)
Single-cell spatial reconstruction reveals global division of labour in the mammalian liver
doi:10.1038/178064a0
Improved mood and memory Although several studies show a link between depression and low B12 levels, there's no evidence that increasing the levels of B12 can help ease depression symptoms
References: Gwyer D et al
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