维生素是维持生命的要素,和蛋白质、脂肪、糖、水及无机盐等物质一样,是人体极需要的物质。当人体缺乏维生素时,生长发育将会受到影响,新陈代谢也不能正常进行,就会出现一系列的维生素缺乏症的症状。这时适量地补充相应的维生素,对改善代谢、保障生长发育、维持正常生命活动、增强抗病能力、促进健康是完全必要的。因此,维生素是临床各科常用的一类药物,使用较为安全,不利反应少,剂量多无严格限制。但是我们也不能忽视维生素对人体的不利方面,而把维生素类药物当作“补养品”长期大量地 Vitamins are the elements that sustain life, and substances such as protein, fat, sugar, water and inorganic salts are very much needed by the body. When the body lacks vitamins, growth and development will be affected, the metabolism can not be normal, there will be a series of vitamin deficiency symptoms. At this time appropriate to add the appropriate vitamin, to improve metabolism, protect the growth and development, maintain normal life activities, enhance disease resistance, and promote health is absolutely necessary. Therefore, vitamins are commonly used in clinical subjects of a class of drugs, the use of more safe, less adverse reaction, the dose without more stringent restrictions. But we can not ignore the negative aspects of vitamins on the human body, and vitamin drugs as a "long-term