偏食不但容易导致维生素及其它营养物质的缺乏,而且还会影响全身的生长发育,并能引起多种皮肤病的发生。维生素A是维持人体上皮组织正常生长机能的必需物质,它可以调节皮肤的角质化过程。当其缺乏时,除了能引起眼干及夜盲症外,还能引起皮脂腺和汗腺萎缩,使皮肤变得干燥、粗糙不光滑,容易出现棘刺状或鸡皮疙瘩样的毛囊丘疹,毛发干枯,面部皮肤无光泽,指趾甲也可变脆变形。另外,维生素A缺乏时又影响微量元素钙 Partial eclipse not only easily lead to the lack of vitamins and other nutrients, but also affect the body’s growth and development, and can cause a variety of skin diseases. Vitamin A is necessary to maintain the normal growth of human epithelial tissue function, it can regulate the skin keratinization process. When it is lacking, in addition to causing dry eye and night blindness, it can also cause atrophy of the sebaceous glands and sweat glands, making the skin dry, rough and rough, prone to spiny prickles or goose bumps like pimple papules, dry hair, no facial skin Gloss, fingernails can also become brittle deformation. In addition, vitamin A deficiency also affects the trace element calcium