维生素B2(<a data-lemmaid="2609855" href="https://baike.baidu.com/item/%E5%8C%96%E5%AD%A6%E5%BC%8F/2609855" style="color: rgb(19, 110, 194); text-decoration: none; font-family: arial, tahoma, "Microsoft Yahei", 宋体, sans-serif; font-size: 14px; text-indent: 28px;" target="_blank">化学式</a>:C17H20N4O6,<a data-lemmaid="1582730" href="https://baike.baidu.com/item/%E5%BC%8F%E9%87%8F/1582730" style="color: rgb(19, 110, 194); text-decoration: none; font-family: arial, tahoma, "Microsoft Yahei", 宋体, sans-serif; font-size: 14px; text-indent: 28px;" target="_blank">式量</a>376.37)又叫<a data-lemmaid="1136118" href="https://baike.baidu.com/item/%E6%A0%B8%E9%BB%84%E7%B4%A0/1136118" style="color: rgb(19, 110, 194); text-decoration: none; font-family: arial, tahoma, "Microsoft Yahei", 宋体, sans-serif; font-size: 14px; text-indent: 28px;" target="_blank">核黄素</a>,微溶于水,在中性或酸性溶液中加热是稳定的。为体内黄酶类辅基的组成部分(黄酶在生物氧化还原中发挥递氢作用),当缺乏时,就影响机体的生物氧化,使代谢发生障碍。其病变多表现为口、眼和外生殖器部位的炎症,如口角炎、<a data-lemmaid="6999870" href="https://baike.baidu.com/item/%E5%94%87%E7%82%8E/6999870" style="color: rgb(19, 110, 194); text-decoration: none; font-family: arial, tahoma, "Microsoft Yahei", 宋体, sans-serif; font-size: 14px; text-indent: 28px;" target="_blank">唇炎</a>、<a data-lemmaid="5390459" href="https://baike.baidu.com/item/%E8%88%8C%E7%82%8E/5390459" style="color: rgb(19, 110, 194); text-decoration: none; font-family: arial, tahoma, "Microsoft Yahei", 宋体, sans-serif; font-size: 14px; text-indent: 28px;" target="_blank">舌炎</a>、眼结膜炎和<a data-lemmaid="8928761" href="https://baike.baidu.com/item/%E9%98%B4%E5%9B%8A%E7%82%8E/8928761" style="color: rgb(19, 110, 194); text-decoration: none; font-family: arial, tahoma, "Microsoft Yahei", 宋体, sans-serif; font-size: 14px; text-indent: 28px;" target="_blank">阴囊炎</a>等,故本品可用于上述疾病的防治。体内<a href="https://baike.baidu.com/item/%E7%BB%B4%E7%94%9F%E7%B4%A0" style="color: rgb(19, 110, 194); text-decoration: none; font-family: arial, tahoma, "Microsoft Yahei", 宋体, sans-serif; font-size: 14px; text-indent: 28px;" target="_blank">维生素</a>B2的储存是很有限的,因此每天都要由饮食提供。维生素B2的两个性质是造成其损失的主要原因:(1)可被光破坏;(2)在碱溶液中加热可被破坏