维生素C对人体的代谢过程或生命活动的许多方面具有重要影响,它的主要来源是膳食,尤其是蔬菜和水果。有些人认为,平时只要多服些维生素C片剂,不吃或少吃蔬菜也能达到同样效果。其实,维生素C药片与蔬菜、水果两者并非一回事。蔬菜除了含有大量的维生素C之外,还含有无机盐、胡萝卜素和其他人体所必需的多种维生素和纤维素,而维生素C药片是不能取代这些成分的。纤维素虽无营养价值,但能促进消化液的分泌,以利食物消化,能刺激胃肠蠕动, Vitamin C has a major impact on many aspects of the body’s metabolic processes or life activities, and its main source is diet, especially vegetables and fruits. Some people think that, usually just take more vitamin C tablets, do not eat or eat less vegetables can achieve the same effect. In fact, vitamin C tablets and vegetables, fruits are not the same thing. In addition to vegetables containing large amounts of vitamin C, vegetables also contain inorganic salts, carotenoids and other essential vitamins and cellulose, and vitamin C tablets can not replace these ingredients. Although there is no nutritional value of cellulose, but can promote the secretion of digestive juice, in order to facilitate food digestion, can stimulate the gastrointestinal motility,