Garzon P, Eisenberg M J
Department of Physiology, McGill University, Montreal, Quebec, Canada.
Am J Med. 1998 Aug;105(2):125-30. doi: 10.1016/s0002-9343(98)00189-2.
Although the annual consumption of bottled water in North America is 12.7 gallons per capita, little is known about the potential health effects of these waters. We reviewed the amounts of major minerals found in commercially available bottled waters, the recommended daily allowances for these minerals, and their beneficial and harmful effects.
We obtained the mineral content of various commercially available bottled waters in North America and Europe from The Pocket Guide to Bottled Water. We then conducted a Medline search to identify articles examining the beneficial and harmful effects of magnesium, sodium, and calcium.
Great variation exists in the mineral content of commercially available bottled waters. Among the bottled waters that we reviewed, the magnesium content ranges from 0 to 126 mg per liter, the sodium content ranges from 0 to 1,200 mg per liter, and the calcium content ranges from 0 to 546 mg per liter. Epidemiologic and clinical studies suggest that magnesium may reduce the frequency of sudden death, that sodium contributes to the occurrence of hypertension, and that calcium may help prevent osteoporosis.
The ideal bottled water should be rich in magnesium and calcium and have a low sodium content. Because there is great variation in the mineral content of commercially available bottled waters, the actual mineral content of bottled water should be considered when selecting one for consumption.
尽管北美地区人均每年瓶装水消费量为12.7加仑，但对于这些水的潜在健康影响却知之甚少。我们回顾了市售瓶装水中主要矿物质的含量、这些矿物质的每日推荐摄入量及其有益和有害影响。
我们从《瓶装水袖珍指南》中获取了北美和欧洲各种市售瓶装水的矿物质含量。然后我们进行了医学文献数据库检索，以识别研究镁、钠和钙的有益和有害影响的文章。
市售瓶装水的矿物质含量存在很大差异。在我们回顾的瓶装水中，镁含量每升从0至126毫克不等，钠含量每升从0至1200毫克不等，钙含量每升从0至546毫克不等。流行病学和临床研究表明，镁可能会降低猝死频率，钠会导致高血压的发生，而钙可能有助于预防骨质疏松症。
理想的瓶装水应富含镁和钙且钠含量低。由于市售瓶装水的矿物质含量差异很大，在选择饮用瓶装水时应考虑其实际矿物质含量。
