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Conversely, severe VitB12 deficiency reportedly causes hypersomnia, possibly due to a disruption in circadian rhythm [41, 42]
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Two inherited disorders cause hereditary cobalamin deficiency: the Imerslund-Grasbeck syndrome and congenital pernicious anemia (intrinsic factor deficiency)
It is essential for the formation and development of red blood cells, the support of a healthy nervous system, and the maintenance of DNA integrity
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