饮用酸性的水质对人体有什么害处

2025-01-24 08:45:46
推荐回答(1个)
回答1:

水中是否含有矿物质与微量元系是决定其酸碱性的关键.水的酸碱度是由水中所含的离子决定的.PH值即酸碱强度,是表示离子的活度的.
天然水的PH值一般在7.0-8.0之间,呈弱碱性;纯净水的PH值一般在5.0-7.0之间,偏酸性.
为什么不宜常喝纯净水(酸性水)?
水生理学专家(北京化工大学水资源研究中心金日光教授等)明确指出,纯净水在失去矿物元素以后,它的水结构和功能也发生了相应的变化,水分子过分串联,变成线团化结构,不仅不易通过细胞膜被人体吸收,相反,细胞内的生命动力元素的离子还会逆向渗透到细胞膜外侧,进到纯净水的“线团”中,致使人体内有益的生命相关元素向体外流失.

纯净水对正在成长的青少年及儿童,负作用更大.水营养学专家强调说:青少年及儿童钙的需要量30%来自于水,不是完全来自于食物,喝纯净水30% 的来源就没有了,这是第一点影响;第二点,食物中的钙比水中的钙吸收要来得慢,要低得很多,水中钙的吸收率可以到90%以上,而食物中的钙受其他营养元素,包括粗纤维、包括植酸的影响,钙的吸收率很低,只有30%.

中国消费者协会2003年3月发布消费提示:专家指出,人体大多适宜喝弱碱性的水,老人、少年儿童及婴幼儿尤其不宜将纯净水作为通常饮用水大量、长期饮用.这是一种带有“官方发言”性质的定论.
2000年7月,新华社专电报道“专家提醒”:不宜将“纯净水”作为通常饮用水大量地长期饮用,婴幼儿及少年儿童尤应慎重.

中央电视台《每周质量报告》:专家解读“纯净水少儿不宜”.

早在1957年日本的科学家就已证明,中风死亡率与饮用水中的酸度密切相关.

美国科学家Burton分析了美国100个大城市的饮用水,发现水的偏碱性是降低癌症死亡率的一个关键性因素;另一个科学家Schroeder也观察到,喝偏酸性的水比较容易引起心血管病.

水生理学专家(北京化工大学水资源研究中心金日光教授等)指出,有些敏感的人感觉纯净水越喝越不解渴、越想喝,长久下来感觉四肢无力,那是因为常喝纯净水,不仅不能补充钙、锌等微量元素,体内已有的矿物质反而会被纯净水都带走,降低了人的免疫功能,甚至引发高血压、心脏病、癌症等疾病.

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