維生素B2(<a data-lemmaid="2609855" style="color: rgb(19, 110, 194); text-decoration: none; font-family: arial, tahoma, "Microsoft Yahei", 宋體, sans-serif; font-size: 14px; text-indent: 28px;" target="_blank">化學(xué)式</a>:C17H20N4O6,<a data-lemmaid="1582730" style="color: rgb(19, 110, 194); text-decoration: none; font-family: arial, tahoma, "Microsoft Yahei", 宋體, sans-serif; font-size: 14px; text-indent: 28px;" target="_blank">式量</a>376.37)又叫<a data-lemmaid="1136118" style="color: rgb(19, 110, 194); text-decoration: none; font-family: arial, tahoma, "Microsoft Yahei", 宋體, sans-serif; font-size: 14px; text-indent: 28px;" target="_blank">核黃素</a>,微溶于水,在中性或酸性溶液中加熱是穩(wěn)定的。為體內(nèi)黃酶類輔基的組成部分(黃酶在生物氧化還原中發(fā)揮遞氫作用),當(dāng)缺乏時(shí),就影響機(jī)體的生物氧化,使代謝發(fā)生障礙。其病變多表現(xiàn)為口、眼和外生殖器部位的炎癥,如口角炎、<a data-lemmaid="6999870" style="color: rgb(19, 110, 194); text-decoration: none; font-family: arial, tahoma, "Microsoft Yahei", 宋體, sans-serif; font-size: 14px; text-indent: 28px;" target="_blank">唇炎</a>、<a data-lemmaid="5390459" style="color: rgb(19, 110, 194); text-decoration: none; font-family: arial, tahoma, "Microsoft Yahei", 宋體, sans-serif; font-size: 14px; text-indent: 28px;" target="_blank">舌炎</a>、眼結(jié)膜炎和<a data-lemmaid="8928761" style="color: rgb(19, 110, 194); text-decoration: none; font-family: arial, tahoma, "Microsoft Yahei", 宋體, sans-serif; font-size: 14px; text-indent: 28px;" target="_blank">陰囊炎</a>等,故本品可用于上述疾病的防治。體內(nèi)<a style="color: rgb(19, 110, 194); text-decoration: none; font-family: arial, tahoma, "Microsoft Yahei", 宋體, sans-serif; font-size: 14px; text-indent: 28px;" target="_blank">維生素</a>B2的儲(chǔ)存是很有限的,因此每天都要由飲食提供。維生素B2的兩個(gè)性質(zhì)是造成其損失的主要原因:(1)可被光破壞;(2)在堿溶液中加熱可被破壞