Mercy Urogynecologist Dr. Mark Ellerkmann Discusses Health Benefits Of Drinking 8 Glasses Of Water A Day

April 1, 2013
Mercy urogynecologist Dr. Mark Ellerkmann

Mercy urogynecologist Dr. Mark Ellerkmann

While many people have heard over the years that they should drink eight ounces of water eight times a day, a recent medical article seems to debunk that myth and others similar to it.

According to an article by Dr. Heinz Valtin at Dartmouth College's Geisel School of Medicine, the "8x8" theory, as it's known, is false. The article says there is no scientific study to back it up.

According to Mercy urogynecologist Dr. Mark Ellerkmann, there are certain situations where drinking a lot of water is necessary, such as being in a hot climate or doing vigorous exercise. There are also certain medical conditions that require extra hydration. But overall, it's not necessary.

"Humans are typically pretty good at regulating their own fluid imbalance. Our thirst center tells us when we are thirsty long before we are dehydrated," Dr. Ellerkmann said.

Valtin's article also said the idea that drinking lots of water can fill a person up is also false.

"What we know about water intake is it doesn't really affect the satiety center in our brain that tells us not to eat so much," Dr. Ellerkmann said.

Another assertion the article makes said caffeinated drinks and some alcoholic beverages actually do count toward your daily water intake.

"Not just water, but any beverages that we drink, including -- believe it or not -- any dilute alcohol. Beer, for example, can be tallied into that overall intake," Dr. Ellerkmann said.



Dan Collins - Senior Director of Media Relations at Mercy Medical Center

Dan Collins, Senior Director of Media Relations

Email: Office: 410-332-9714 Cell: 410-375-7342

About Mercy

Founded in 1874, Mercy Medical Center is a university-affiliated medical facility named one of the top 100 hospitals in the U.S. by Thomson-Reuters with a national reputation for women’s health. Mercy is home to the nationally acclaimed Weinberg Center for Women’s Health and Medicine as well as the $400+ million, 20-story Mary Catherine Bunting Center. For more information visit Mercy online at, Facebook, Twitter or call 1-800-MD-MERCY.

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