叶酸是一种水溶性的B族维生素,存在于小到病毒、细菌,大到人类的所有生命系统中。因为它最初是从菠菜叶中提取得到的,所以称为叶酸。食物中的叶酸进入人体后转变为四氢叶酸,在体内发挥生理作用。叶酸在体内的总量仅5～6毫克,但几乎参与所有的生化代谢过程,参与体内许多重要物质如蛋白质、脱氧核糖核酸(DNA)、血红蛋白等的合成,从而对细胞分裂和生长有重要作用。无论是何种原因造成体内叶酸缺乏时,其直接 Folic acid is a water-soluble B vitamins found in all life systems as small as viruses, bacteria, and humans. Because it was originally extracted from spinach leaves, so called folic acid. Folic acid in food into the human body into tetrahydrofolate, in the body to play a physiological role. Folic acid in the body of the total amount of only 5 to 6 mg, but almost all involved in the biochemical metabolic processes, the body involved in the synthesis of many important substances such as proteins, DNA, hemoglobin, and thus have an important role in cell division and growth . No matter what the cause of folic acid deficiency in the body when its direct