漫步孤岛
怀抱观古今 深心托豪素
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白开水超过三天不宜喝
很多人认为白开水无论放多久都能饮用,这是不对的,白开水超过三天就不宜饮用了。
水储存过久,就会被细菌感染产生亚硝酸盐,亚硝酸盐一旦大量进入人体,能使组织缺氧,出现恶心、呕吐、头痛、心慌等症状,严重还能使人缺氧致死。亚硝酸盐在人体内还能形成亚硝胺,促发肝癌、胃癌等。
装在保温瓶里的开水变温后,细菌繁殖更快,还原的亚硝酸盐更多,这样的温水就更是不能喝了!
posted on Friday, August 26, 2005 11:26 PM
#健康小贴士
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