If you experience severe allergic reactions, such as difficulty breathing, hives, or swelling of the face, lips, tongue, or throat, it is important to seek immediate medical attention
however, cases of hypercobalaminemia in leukemia, autoimmune diseases, and pulmonary and renal dysfunction have also been observed (Andrs et al., 2013
National Library of Medicine: Indeed, DNA synthesis is impaired by low vitamin B12, which hampers the activation of folate and, as a result, decreases normal red blood cell production, impairing oxygen delivery [62] WebMD indicates, if you have vitamin B12 deficiency, you could become anemic
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