维生素缺乏所致的脱发病,教科书已有记载,如维生素A、D等脂溶性维生素是其代表,而维生素B_2B_6缺乏所致的脱发病,可能继发于脂溢性皮炎,这一现象见于动物实验,然而,是否同样适用于人类的维生素缺乏症?在难以发现这种病例的今天,很难作出结论。不过由于投给过量的维生素A所致的脱发病却经常遇到。目前,维生素与脱发病之间的关系,维生素D又彼人们所重视。这是由于维生素D在细胞质内代谢的研究有了很大进展的缘故。皮肤中的7-脱氢胆固醇,在中波紫外线 Vitamin deficiency caused by hair loss disease, textbooks have been documented, such as vitamins A, D and other fat-soluble vitamins are its representatives, and vitamin B_2B_6 deficiency hair loss disease may be secondary to seborrheic dermatitis, a phenomenon seen in animals Experiments, however, are equally applicable to vitamin deficiency in humans? It is difficult to conclude today when it is difficult to detect such cases. However, it is often encountered due to hair loss caused by overdosing of vitamin A. At present, the relationship between vitamins and hair loss disease, vitamin D and they attach importance. This is due to the great progress made in the study of vitamin D metabolism in the cytoplasm. 7-dehydrocholesterol in the skin, in UVB