Navigation Links
Brains of Obese May Crave High-Calorie Foods More: Study
Date:9/19/2011

By Randy Dotinga
HealthDay Reporter

MONDAY, Sept. 19 (HealthDay News) -- A new study links low blood sugar in obese people to a greater desire within the brain for high-calorie foods, a finding that offers insight into why people who become overweight tend to stay that way.

"Their brains may be driving them to eat more and desire these foods more, and that may promote overeating," explained study author Kathleen A. Page. "We don't know if that's a consequence of obesity or contributes to the obese state. Are their brains wired differently from the start? Or does that happen after they become obese?"

Whatever the case, the research points to the importance of keeping blood sugar levels stable, said Page, an assistant professor of medicine at the University of Southern California.

Levels of sugar in the blood are directly linked to energy, and those levels often drop after eating lunch and cause a mid-afternoon slump. Blood sugar levels also drop in the morning, and after you eat a high-sugar food, Page said. In that case, the body's processing of the excess sugar can cause levels to dip.

In the new study, published in the Sept. 19 online issue of The Journal of Clinical Investigation, Page and colleagues tried to figure out if dips in blood sugar affect obese people differently than those who aren't overweight.

In the study, functional MRI scanners monitored the brains of five obese and nine non-obese people as researchers adjusted the levels of sugar in their blood, changing them from normal to low. At the same time, the researchers showed them pictures of foods that are low-calorie (various fruits and vegetables, tofu, soybeans, salads) and high-calorie foods (brownies, donuts, fried chicken, steak, ice cream and more).

The researchers found that the obese people had less brain activity in the area known as the prefrontal cortex, where powers of inhibition (choosing not to do things) are based, even when their blood sugar levels were normal. "That implies that obese people may have a harder time fighting off the urge to eat, especially when their sugar levels are below normal," Page said.

Jean-Philippe Chaput, an assistant professor at the University of Ottawa's School of Human Kinetics, said the research is relevant because it provides greater understanding into how blood sugar affects eating habits. "Future obesity treatments will need to take that aspect into account if we want to improve our chances of success," Chaput said.

But Dr. Marc-Andre Cornier, an associate professor of medicine at the University of Colorado, cautioned that the study doesn't definitively link blood sugar to hunger. "The lower glucose may have impacted another factor that in turn was responsible for the effects," he said, adding that it's "pure speculation" to say that keeping blood sugar levels stable after meals will reduce hunger.

More information

For more about obesity, try the U.S. National Library of Medicine.

SOURCES: Kathleen A. Page, Ph.D., assistant professor, medicine, University of Southern California, Los Angeles; Jean-Philippe Chaput, Ph.D., junior research chair, Healthy Active Living and Obesity Research, and assistant professor, School of Human Kinetics, University of Ottawa; Marc-Andre Cornier, M.D., associate professor, medicine, University of Colorado, Denver; Sept. 19, 2011, The Journal of Clinical Investigation, online


'/>"/>
Copyright©2010 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Alzheimers brains found to have lower levels of key protein
2. Learning information the hard way may be best boot camp for older brains
3. Profound reorganization in brains of adults who stutter
4. Like Those in Humans, Baby Chimps Forebrains Immature
5. Concussion Project Finds Disease in Two Autopsied Brains
6. Human Brains Wired to Empathize, Study Finds
7. Picower: 1 skull + 2 brains = 4 objects in mind
8. Some Brains Easily Distracted by Rewarding Stimuli
9. Scientists Find Molecular Similarities in Brains of Those With Autism
10. Mammals Brains Grew Larger to Enhance Sense of Smell: Study
11. Brains of Autistic Kids Still Larger at Age 4, 5
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Brains of Obese May Crave High-Calorie Foods More: Study
(Date:5/3/2016)... ... ... For over 23 years, Doctors on Liens has committed to ... and therapists treating personal injury patients on a lien basis. With the recent addition ... in Santa Monica, Doctors on Liens is continuing that tradition. While the network ...
(Date:5/3/2016)... MA (PRWEB) , ... May 03, 2016 , ... Registration is now open for the ... June 5, 2016 at the Hatch Memorial Shell on the Esplanade. The event regularly draws ... The 5K Run is a competitive, timed event fully sanctioned by the USA Track & ...
(Date:5/3/2016)... ... , ... Cosmetic surgeon Dr. Mark Youssef first introduced Voluma® to his ... his menu of services to give his patients as many options as possible in ... improving his approach to ensure he stays at the forefront of the most modern ...
(Date:5/3/2016)... Pasadena, CA (PRWEB) , ... May 03, 2016 ... ... tuition-free, accredited American online university, has announced today the launch of its Associates ... Nobel Laureate and President Emeritus of The Rockefeller University, Dr. Torsten N. Wiesel; ...
(Date:5/3/2016)... ... May 03, 2016 , ... Nationally recognized personal injury law firm Monge & Associates ... roses to anyone who wants one for their Mother or any other mother figure. , ... contributions of Mothers.” Monge goes on to say, “we are choosing to do this ...
Breaking Medicine News(10 mins):
(Date:5/3/2016)... announced today that it is celebrating Hepatitis Awareness Month with a campaign to honor patients ... and encourage those at risk to get tested and begin the road to a life ... ... ... Inc.) ...
(Date:5/3/2016)... PROVO, Utah , May 3, 2016  Forté Elements, LLC (Forté) is excited ... use nutritional products that address the nutritional needs of recovery for a variety of ... its products. Photo - http://photos.prnewswire.com/prnh/20160502/362548 Logo -  http://photos.prnewswire.com/prnh/20160502/362547LOGO ... ... ...
(Date:5/2/2016)... , May 2, 2016  Deerfield announced today ... of Graybug Vision, Inc. Graybug Vision is an ... that may transform care for ocular diseases including ... Vision,s technology was first developed at Johns Hopkins ... startup venture. Graybug Vision is ...
Breaking Medicine Technology: