Featured Research

from universities, journals, and other organizations

Double Trouble: Big Portions Of Calorie Dense Foods

Date:
October 14, 2003
Source:
Penn State
Summary:
Big portions encourage people to eat more but big portions of calorie dense food -- the kind Americans tend to grab on the run -- boost calorie consumption even higher without providing additional satisfaction, a new Penn State study has shown.

Big portions encourage people to eat more but big portions of calorie dense food -- the kind Americans tend to grab on the run -- boost calorie consumption even higher without providing additional satisfaction, a new Penn State study has shown.

Related Articles


The study, the first to focus on the combined effects of both portion size and calorie density or the calories per ounce, showed that calorie density and portion size add together to affect caloric intake. Tanja Kral, doctoral candidate in nutritional sciences who conducted the study as part of her dissertation, says, "Even though the study participants consumed 221 fewer calories when offered a smaller meal of lower calorie density, they felt just as full and satisfied as when they had consumed a larger meal of higher calorie density."

Kral's dissertation adviser is Dr. Barbara Rolls, who holds the Guthrie Chair of Nutrition in Penn State's College of Health and Human Development. "The fact that the participants in this study didn't notice when they were given lower calorie density food offers evidence that the food industry could change their products to make them healthier without causing customer dissatisfaction," Rolls says. "Small reductions in the calorie density of foods will allow people to eat satisfying portions without consuming too many calories which, in turn, may help them with weight management."

Kral presented her results in a paper, "The Combined Effects of Energy Density and Portion Size on Food and Energy Intake in Women," today (Oct. 13) at the annual meeting of the North American Association for the Study of Obesity in Fort Lauderdale, Fla. Her co-authors are Liane Roe, research nutritionist, and Rolls. Kral is one of five finalists selected for the Ethan Sims Young Investigator Award to be announced at the meeting.

In the study, 39 normal weight and overweight women ate breakfast, lunch and dinner once a week for six weeks in Penn State's Laboratory for the Study of Human Ingestive Behavior. The breakfasts and dinners were standardized but the main entree at lunch was formulated to vary in calorie density as well as portion size.

The lunch entree was a pasta bake made from medium shells, zucchini, broccoli, carrots, onions, tomato sauce and parmesan, mozzarella and ricotta cheese. The calorie density was changed by varying the proportions of ingredients. The amount served was also varied from two cups to two and three-quarters cups to three and a half cups.

"Portion size alone increased calorie intake by 20 percent. Calorie density alone increased intake by 26 percent," Kral says. "Together, portion size and calorie density increased calorie intake by 56 percent." Rolls notes, " In practical terms, the study shows that big portions of high calorie foods put people at greater risk of overeating than big portions alone. If you like big portions, stick to water-rich foods that don't have too much fat. Other research in our laboratory has shown that big portions of a low-calorie salad as a first course can even help lower the total amount of calories you consume."

The study was supported by a grant from the National Institute of Diabetes, Digestive and Kidney Diseases.


Story Source:

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


Cite This Page:

Penn State. "Double Trouble: Big Portions Of Calorie Dense Foods." ScienceDaily. ScienceDaily, 14 October 2003. <www.sciencedaily.com/releases/2003/10/031014071701.htm>.
Penn State. (2003, October 14). Double Trouble: Big Portions Of Calorie Dense Foods. ScienceDaily. Retrieved October 26, 2014 from www.sciencedaily.com/releases/2003/10/031014071701.htm
Penn State. "Double Trouble: Big Portions Of Calorie Dense Foods." ScienceDaily. www.sciencedaily.com/releases/2003/10/031014071701.htm (accessed October 26, 2014).

Share This



More Health & Medicine News

Sunday, October 26, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Texas Nurse Nina Pham Cured of Ebola

Texas Nurse Nina Pham Cured of Ebola

AFP (Oct. 25, 2014) — An American nurse who contracted Ebola while caring for a Liberian patient in Texas has been declared free of the virus and will leave the hospital. Duration: 01:01 Video provided by AFP
Powered by NewsLook.com
Toxin-Packed Stem Cells Used To Kill Cancer

Toxin-Packed Stem Cells Used To Kill Cancer

Newsy (Oct. 25, 2014) — A Harvard University Research Team created genetically engineered stem cells that are able to kill cancer cells, while leaving other cells unharmed. Video provided by Newsy
Powered by NewsLook.com
IKEA Desk Converts From Standing to Sitting With One Button

IKEA Desk Converts From Standing to Sitting With One Button

Buzz60 (Oct. 24, 2014) — IKEA is out with a new convertible desk that can convert from a sitting desk to a standing one with just the push of a button. Jen Markham explains. Video provided by Buzz60
Powered by NewsLook.com
Ebola Protective Suits Being Made in China

Ebola Protective Suits Being Made in China

AFP (Oct. 24, 2014) — A factory in China is busy making Ebola protective suits for healthcare workers and others fighting the spread of the virus. Duration: 00:38 Video provided by AFP
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