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For most beginners, the goal isn't to hit that top dose
Equally important during this phase is keeping your diet dialed in
Vitamin B12 deficiency Having trouble absorbing vitamin B12 from food, lacking intrinsic factors (for example, as a result of pernicious anaemia), having gastrointestinal surgery, taking certain medications for an extended period of time (such as metformin or proton pump inhibitors), and nutritional deficiencies are all causes of vitamin B12 deficiency
doi: 10.1016/j.micpath.2007.09.002 37 YagiK
Occluded Superior Mesenteric Artery and Vein
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