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The Case Against Drinking 6 to 8 Glasses of Water a Day


This is an older article that may not reflect Dr. Mercola’s current view on this topic. Use our search engine to find Dr. Mercola’s latest position on any health topic.

Dr. Margaret McCartney, a general practitioner from Scotland, says that the common health advice that you should drink six to eight cups of water each day is "thoroughly debunked nonsense".  She argues that it is propagated by bottled water companies out to make a profit.

In a commentary, McCartney quoted experts who say that drinking too much water can cause hyponatremia (low sodium levels in the blood).


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