Thursday, April 3, 2008

Drink Eight Glasses of Water a Day

2 April 2008

Research debunks health value of guzzling water

By Will Dunham

WASHINGTON (Reuters) - The notion that guzzling glasses of water to flood yourself with good health is all wet, researchers said on Wednesday.

Dr. Stanley Goldfarb and Dr. Dan Negoianu of the University of Pennsylvania in Philadelphia reviewed the scientific literature on the health effects of drinking lots of water. [...]

Their scientific review, published in the Journal of the American Society of Nephrology, is the latest to undercut the recommendations advanced by some experts to drink eight glasses of 8 ounces (225 ml) of water a day. [...]

Dan Negoianu and Stanley Goldfarb, "Just Add Water."
J Am Soc Nephrol, published April 2, 2008 as doi:10.1681/ASN.2008030274

[For an earlier study by Heinz Valtin, see

Am J Physiol Regul Integr Comp Physiol 283: R993-R1004, 2002.
"Drink at least eight glasses of water a day." Really? Is there scientific evidence for "8 W 8"?]

4 April 2008

Who Says You Need Eight Glasses a Day? The history of a debunked theory.

By Nina Shen Rastogi

A recent editorial in the Journal of the American Society for Nephrology is getting wide press coverage for debunking the so-called "8x8" theory - the popularly held belief that drinking eight 8-ounce glasses of water daily helps remove toxins, improve skin tone, and increase satiety, among other health benefits. The authors chalk up the belief to folklore, and newspaper reports claim ignorance as to its provenance. Just how long has this idea been around? [...]