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Of slightly greater concern, but to only a very few people, is the presence of the cobalt
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Higher plants do not concentrate methylcobalamin from the soil, making them a poor source of the substance as compared with animal tissues
According to NICE Clinical Knowledge Summaries, B12 supplementation for confirmed deficiency should follow established protocols, but routine monitoring of B12 levels after treatment initiation is not always necessary unless clinical response is inadequate
In severe cases, this may be accompanied by sweating, shortness of breath, chest pain, hoarseness, facial swelling, and fever
Endocrine Reviews, 2003
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