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News from April 2008

8 Glasses of Water a Day--myth or fact?

April 15, 2008

A recent review of literature done by a team of Canadian and American researchers for the Dietary Reference Intakes, (DRI) indicates that drinking eight glasses of water a day or more is not necessary for a healthy diet, nor can it be directly correlated to assist in weight reduction.

As a result of the review, the DRI recommendation is for ‘total’ water intake as the body regulates hydration quite well by absorbing water from all food, including meat, vegetables, dairy products and non-alcoholized beverages. Broccoli, for example, is 90% water, bread 35%, and meat, fish and poultry contain 50%-60% water.

There is no clear evidence to support drinking water as a weight loss strategy. Dr. Susan Barr, (RDC, FACSM, FDC) a professor and researcher in the Faculty of Land and Food Systems at UBC who participated in the review says, “if you drink a lot of water, right at the moment you will feel full. But half an hour later, your stomach will be empty and you’ll be hungry.”

More hydration is necessary for those who are undertaking strenuous exercise and DRI guidelines for hydration and exercise will be coming out in the autumn.

Further Sources:

Online overview Dietary Reference Intakes for Water Potassium Sodium, Chloride and Sulfate

American College of Sports Medicine Position Stand

Just Add Water

  • The Dietary Reference Intakes (DRIs) are quantitative estimates of nutrient intakes to be used for planning and assessing diets for healthy people. This new report, the sixth in a series of reports presenting dietary reference values for the intakes of nutrients by Americans and Canadians, establishes nutrient recommendations on water, potassium, and salt for health maintenance and the reduction of chronic disease risk.