由于缺乏饮水中钠对健康影响的人群调查资料,美国环保局未提出饮水中钠的最高限量浓度。本世纪初以来的大量流行病学和临床调查,支持过量摄入钠导致高血压的假设。由食物摄入的钠通常远多于从饮水摄入的钠。除采用低盐膳食者外,由水摄入的钠占总摄入量的0.6～9.0%。几乎以往所有关于高血压与钠摄入量关系的调查,均只考虑食物而忽视饮水一方面。有人报道,饮水中高浓度钠对梅尼埃尔 Due to the lack of survey data on the health effects of sodium in drinking water, the US EPA did not raise the maximum concentration of sodium in drinking water. A large number of epidemiological and clinical investigations since the beginning of this century support the hypothesis that excessive sodium intake leads to high blood pressure. Sodium intake from food is usually far more than sodium intake from drinking water. In addition to the use of low salt diet, sodium intake by water accounts for 0.6 to 9.0% of total intake. Almost all previous surveys on the relationship between high blood pressure and sodium intake were based on food but neglect of drinking water on the one hand. It was reported that drinking high concentrations of sodium on the Meniere