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Causes and Symptoms of B12 Deficiency Deficiency can arise from: Poor dietary intake Malabsorption issues (e.g., pernicious anemia, atrophic gastritis) Gastrointestinal surgeries or disorders (e.g., Crohns disease) Certain medications affecting stomach acid or absorption Symptoms of deficiency include fatigue, weakness, numbness or tingling in hands and feet, memory difficulties, mood changes, and in severe cases, neurological damage

Drawing up B12 from the open ampoule Step 1 Remove the purple drawing needle out of the packet

That trial results transfer to research-market material trial data describe a characterized study drug, not the contents of an arbitrary vial