维生素 B2 和 B12 在化学结构、生理功能、食物来源、缺乏症状以及临床应用等方面存在差异。 1. 化学结构：维生素 B2 又称核黄素，其化学结构包含核糖醇和异咯嗪环；维生素 B12 即钴胺素，是一类含钴的咕啉类化合物。 2. 生理功能：维生素 ...

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