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4,5 Dietary insufficiency, pernicious anemia (i.e., an autoimmune process that reduces available intrinsic factor and subsequent absorption of vitamin B 12 1,2,6,7 ), and long-term use of metformin or acid-suppressing medications have been implicated in B 12 deficiency
These should be communicated to the prescriber
One of the effects of vitamin B-12 deficiency is lethargy or the lack of energy
Many clients report steadier energy throughout the day, better workout performance, and less need to rely on stimulants
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