START A PETITION 25,136,189 members: the world's largest community for good
559,359 people care about Real Food

Is Your Glass Half Empty? Mild Dehydration Causes Pessimism

Is Your Glass Half Empty? Mild Dehydration Causes Pessimism

According to a new study on dehydration and mood, the optimist may view her glass as half full because she drank that water already. While mild dehydration didn’t appear to affect cognitive function in the young women who participated in the study, it did dampen their moods and caused them to perceive tasks as much harder than when well-hydrated.

For the study, which appears in the January 2012 issue of the Journal of Nutrition, researchers induced mild dehydration among 25 subjects and measured their performance on tests of memory, concentration, and mood. When dehydrated, the women were more negative, had trouble concentrating and were “more fatigued, and this was true during mild exercise and when sitting at a computer,” explained University of Connecticut professor and lead researcher Lawrence E. Armstrong, PhD in a WebMD story.

Dr. Robert Glatter of Lenox Hill Hospital in New York City told WebMD that the study should serve as a reminder to stay hydrated. “Just a small change in state of hydration was enough to affect mood, ability to concentrate, and lead to development of headaches,” he said. Dr. Glatter recommends consuming moderate quantities of water, both during and after exercise.

It turns out that, as actress Jennifer Aniston famously warned last year, not drinking enough water can make you “cranky.” While Jen’s right that regularly filling your water glass could improve your mood, if you want to be really smart, you’ll get that water from the tap.

Related: 10 Ways to Increase Your Daily Water Intake

Read more: , , , , , , ,

photo copyright:

quick poll

vote now!

Loading poll...

have you shared this story yet?

some of the best people we know are doing it


+ add your own
9:18AM PDT on Apr 6, 2013

makes sense to me, thanks

5:12PM PDT on Jul 28, 2012

yep this study could very well be makes sense

4:41PM PDT on May 30, 2012

very very interesting...

9:37PM PST on Feb 10, 2012

great article..ty

7:45PM PST on Feb 10, 2012

Great info! water is amazing and vital to life and our planet. Thank you for article, and the ending reference, 'water from the tap'. Another must read article.

12:27PM PST on Feb 10, 2012

Well - I guess there are always exception to the rule. I am always a bit dehydrated because of a kidney issue - but I have never been a pessimist.
But if water makes you happy - have at it!

Please sign my petition:

7:51AM PST on Feb 10, 2012

Not really surprising, but good to have it spelled out. thanks

11:00AM PST on Feb 9, 2012


9:11AM PST on Feb 9, 2012

Grazie per l'articolo

5:24PM PST on Feb 8, 2012

Regardless of what the studies may say, the tap water in my city (Philadelphia) is so filled with chemicals it just tastes awful. I will continue to drink my bottled water to stay hydrated.

add your comment

Disclaimer: The views expressed above are solely those of the author and may not reflect those of
Care2, Inc., its employees or advertisers.

Care2 - Be Extraordinary - Start a Care2 Petition
ads keep care2 free

Recent Comments from Causes

Our executions of woman are increasing too, some also are innocent of their charges and are instead scapegoats…

Wonder how much it cost TransCanada to buy that enbdorsement?

#5 - Beware Halloween haunted houses created or sponsored by Christian church groups. These usually…

meet our writers

Beth Buczynski Beth is a freelance writer and editor living in the Rocky Mountain West. So far, Beth has lived in... more
ads keep care2 free

more from causes

Animal Welfare

Causes Canada

Causes UK


Civil Rights


Endangered Wildlife

Environment & Wildlife

Global Development

Global Warming

Health Policy

Human Rights

LGBT rights


Real Food

Trailblazers For Good

Women's Rights

Select names from your address book   |   Help

We hate spam. We do not sell or share the email addresses you provide.