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Beneath these secondary causes is primary MS fatigue, called lassitude, the cause of which is unknown
Antacids and proton pump inhibitors such as Prilosec, Protonix, Prevacid, Aciphex, Zantac and Pepcid also can lead to B12 deficiency, because they reduce the stomach acid necessary to release the B12 from food
(2015) 5:CD001287
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