水烧开后最好六小时内喝完,这个时间段的水对身体最为有益。
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专家总结出四种水不要喝:
一、老化水:俗称“死水”,也就是长时间放置不动的水,会使细胞新陈代谢明显减慢,可能影响未成年人生长发育,中老年人则会加速衰老。此外,很多地方食道癌、胃癌发病率地日益增高,据研究可能和长时间饮用老化水有关。有关资料表明,老化水中地有毒物质,会随着水贮存时间地增加而增多。建议水烧开后六个小时之内喝完。
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二、蒸馏水:很多人把它跟矿泉水混淆。蒸馏水经过人工净化,纯度达到99.9%,但pH值显示为酸性,一般都用在医学上。
三、生水:即自来水。
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四、纯净水:清洁了,但无功能,也不是健康水。除去了人体所必须的钾钙镁铁锌等矿物质,不利于人体营养均衡。而且pH值成酸性。