قال موقع فيري ويل هيلث إن فيتامين ب12 يُعتبر عنصرًا غذائيًا أساسيًا يساعد الجسم على:
عند انخفاض مستويات فيتامين ب12، قد تظهر مجموعة واسعة من الأعراض، والتي يمكن أن تشمل:
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