Featured Research

from universities, journals, and other organizations

Dieting youth show greater brain reward activity in response to food

Date:
May 2, 2013
Source:
Oregon Research Institute
Summary:
Research results imply that dieting characterized by meal skipping and fasting would be less successful than weight loss efforts characterized by intake of low energy dense healthy foods.

The story is a familiar one: most people are able to lose weight while dieting but once the diet is over, the weight comes back. Many of us can personally attest that caloric deprivation weight loss diets typically do not produce lasting weight loss. Oregon Research Institute (ORI) senior scientist Eric Stice, Ph.D., and colleagues provide results in a recent issue of NeuroImage that further our understanding of how and why most weight loss diets fail and provide a more comprehensive description of the impact of caloric restriction.

Related Articles


Results suggest that restricting food intake increases the reward value of food, particularly high-calorie, appetizing food (chocolate milkshakes), and that the more successful people are at caloric-restriction dieting, the greater difficulty they will face in maintaining the restriction. Additionally, abstaining from food intake for longer durations of time also increases the reward value of food, which may lead to poor food choices when the individual eventually does eat. Results imply that dieting characterized by meal skipping and fasting would be less successful than weight loss efforts characterized by intake of low energy dense healthy foods.

"These results are unique," said Stice "in that these data are the first to suggest that elective caloric restriction increases the degree to which brain regions implicated in reward valuation and attention are activated by exposure to palatable foods."

Participants were two groups of adolescents (Study 1 n=34; Study 2 n=51) who voluntarily restricted their caloric intake so as to approximate what occurs with real-world dieters. Using a brain imaging paradigm, Stice and his team examined the responsivity of adolescent's attention and reward regions of the brain to the individual's exposure to and imagined intake of palatable foods, unpalatable foods, and glasses of water shown in pictures. By including both pictures of palatable and unpalatable foods, the team was able to determine whether degree of "self-imposed" caloric deprivation correlated with hyper-responsivity of attention and reward regions for palatable versus unpalatable foods. In a second paradigm, the team measured teen's neural responses to consumption and anticipated consumption of a chocolate milkshake and a calorie-free tasteless solution. Stice examined whether the number of hours since last caloric intake (which varied from 3 to 22 hours) correlated with neural activation in response to receipt and anticipated receipt of a palatable food. They also tested whether youth who were in a negative energy balance for a 2-week period versus energy balance or a positive energy balance showed aberrant neural response to food stimuli.

"The implications of this imaging study are crystal clear; if people want to lose excess weight, it would be more effective to consume healthy, low-fat/low-sugar foods during regular meals, rather than go for long periods of time without any caloric intake" says Dr. Stice.

Funded by the National Institutes of Health (NIH), Stice has been studying eating disorders and obesity for 20 years. He has conducted this line of research at Stanford University and the University of Texas, and now continues at the Oregon Research Institute in Eugene, Oregon. This line of research has produced several prevention programs that effectively reduce risk for onset of eating disorders and obesity.


Story Source:

The above story is based on materials provided by Oregon Research Institute. Note: Materials may be edited for content and length.


Journal Reference:

  1. Eric Stice, Kyle Burger, Sonja Yokum. Caloric deprivation increases responsivity of attention and reward brain regions to intake, anticipated intake, and images of palatable foods. NeuroImage, 2013; 67: 322 DOI: 10.1016/j.neuroimage.2012.11.028

Cite This Page:

Oregon Research Institute. "Dieting youth show greater brain reward activity in response to food." ScienceDaily. ScienceDaily, 2 May 2013. <www.sciencedaily.com/releases/2013/05/130502142655.htm>.
Oregon Research Institute. (2013, May 2). Dieting youth show greater brain reward activity in response to food. ScienceDaily. Retrieved November 24, 2014 from www.sciencedaily.com/releases/2013/05/130502142655.htm
Oregon Research Institute. "Dieting youth show greater brain reward activity in response to food." ScienceDaily. www.sciencedaily.com/releases/2013/05/130502142655.htm (accessed November 24, 2014).

Share This


More From ScienceDaily



More Health & Medicine News

Monday, November 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Ebola-Hit Sierra Leone's Late Cocoa Leaves Bitter Taste

Ebola-Hit Sierra Leone's Late Cocoa Leaves Bitter Taste

AFP (Nov. 23, 2014) The arable district of Kenema in Sierra Leone -- at the centre of the Ebola outbreak in May -- has been under quarantine for three months as the cocoa harvest comes in. Duration: 01:32 Video provided by AFP
Powered by NewsLook.com
Don't Fall For Flu Shot Myths

Don't Fall For Flu Shot Myths

Newsy (Nov. 23, 2014) Misconceptions abound when it comes to your annual flu shot. Medical experts say most people older than 6 months should get the shot. Video provided by Newsy
Powered by NewsLook.com
WFP: Ebola Risks Heightened Among Women Throughout Africa

WFP: Ebola Risks Heightened Among Women Throughout Africa

AFP (Nov. 21, 2014) Having children has always been a frightening prospect in Sierra Leone, the world's most dangerous place to give birth, but Ebola has presented an alarming new threat for expectant mothers. Duration: 00:37 Video provided by AFP
Powered by NewsLook.com
Could Your Genes Be The Reason You're Single?

Could Your Genes Be The Reason You're Single?

Newsy (Nov. 21, 2014) Researchers in Beijing discovered a gene called 5-HTA1, and carriers are reportedly 20 percent more likely to be single. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins