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Vitamin B12 is a vital nutrient that plays a key role in the production of red blood cells, maintaining healthy nerve function, and supporting DNA synthesis

References (1) Pejman S, Kamarehei M, Riazi G, Pooyan S, Balalaie S

There is limited evidence that high vitamin B12 levels directly cause dizziness or fatigue

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A 2004 study by the University of Alabama found that the red blood cells in male Alzheimers patients showed a significant lack of glutathione