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This complex then moves to the ileum, where receptors absorb it
Besides a poor diet, one of the main causes of B12 deficiency is malabsorption of the intestine, which occurs due to various medical conditions or medications that inhibit the bodys natural absorption mechanism
An older study looked at the effects of hydrocortisone (a type of corticosteroid) on brain function and sleep
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
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