Assertion: vitamin b12's deficiency | /r/HasSubevent | nausea
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Source sentences:
text: This vitamin's deficiency leads to nausea, vomiting, loss of appetite, diarrhea, sore mouth and tongue and poor absorption of nutrients from food, many of which are glutathione cofactor vitamins and minerals that assist in the formation of a glutathione molecule, its recycling and the proper functioning of the whole glutathione enzymatic system.