Featured Research

from universities, journals, and other organizations

Legumes Found To Contain Starch Carrying A Fiber-Like Punch

Date:
February 7, 2001
Source:
University Of Illinois At Urbana-Champaign
Summary:
Legumes often fall far below popular grains and moisture-laden fruits and vegetables on the list of foods Americans eat to try to meet the American Dietetic Association-recommended 25 to 35 grams of dietary fiber per day. University of Illinois researchers, however, say many legumes (beans, lentils and peas) should be on more plates.

Champaign, IL — Legumes often fall far below popular grains and moisture-laden fruits and vegetables on the list of foods Americans eat to try to meet the American Dietetic Association-recommended 25 to 35 grams of dietary fiber per day. University of Illinois researchers, however, say many legumes (beans, lentils and peas) should be on more plates.

In the February issue of the Journal of Nutrition, UI animal scientists fill a knowledge gap in the ADA’s 1997 position paper on dietary fiber. Legumes, they report, contain substantially higher percentages of resistant starch than do cereal grains, flours and grain-based food products. Resistant starch does not digest easily. It goes past the stomach and small intestine before settling in the colon. There, bacteria attack it just as they do a dietary fiber, producing butyrate – a short-chained fatty acid desirable for its cancer-preventing qualities.

The study provides the first database of the percentages of starch and fiber in common food and feed ingredients. The researchers also determined how and where in vitro digestion occurred by studying digestion in the lower part of the small intestine in a dog model representative of the human digestive tract.

“The nice thing about legumes is that they have a great deal of dietary fiber plus the resistant starch,” said George C. Fahey Jr., who led the study. “You always think of legumes for their protein, as you should. With their protein, fiber and resistant starch, these foodstuffs offer good nutrition. Until now, we never knew legumes had so much of their starch in the form of resistant starch.” Of the 29 food and feed ingredients studied, the legumes (seven varieties) contained substantially higher percentages of both dietary fiber and resistant starch. Black beans, for instance, contain the highest amount of total dietary fiber (43 percent), and 63 percent of their total starch content is resistant starch that makes it to the colon.

Cereal grains, especially barley and corn, followed legumes in their percentages of resistant starch that reach the colon, but like all non-legumes tested they dropped significantly in fiber content. Heavily processed flours and grain-based products dropped off most dramatically in their resistant starch content with a range of just under 2 percent in rice to 15 percent in rolled oats reaching the colon.

“Flours don’t have much resistant starch, because they are processed so much,” Fahey said. “A lot of grain-based foods also don’t have very much resistant starch. If we eat grain-based materials that are not heavily processed and legumes, which we usually eat after minimal cooking, we get a lot of resistant starch and a lot of fiber as colonic foods.”

The Illinois Council on Food and Agricultural Research funded the work. Co-authors of the paper with Fahey are Neal R. Merchen, a professor of animal sciences; Christine M. Grieshop and Avinash R. Patil, both postdoctoral researchers; and graduate students Geoff E. Bednar and Sean M. Murray.


Story Source:

The above story is based on materials provided by University Of Illinois At Urbana-Champaign. Note: Materials may be edited for content and length.


Cite This Page:

University Of Illinois At Urbana-Champaign. "Legumes Found To Contain Starch Carrying A Fiber-Like Punch." ScienceDaily. ScienceDaily, 7 February 2001. <www.sciencedaily.com/releases/2001/02/010205080131.htm>.
University Of Illinois At Urbana-Champaign. (2001, February 7). Legumes Found To Contain Starch Carrying A Fiber-Like Punch. ScienceDaily. Retrieved August 1, 2014 from www.sciencedaily.com/releases/2001/02/010205080131.htm
University Of Illinois At Urbana-Champaign. "Legumes Found To Contain Starch Carrying A Fiber-Like Punch." ScienceDaily. www.sciencedaily.com/releases/2001/02/010205080131.htm (accessed August 1, 2014).

Share This




More Health & Medicine News

Friday, August 1, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

House Republicans Vote to Sue Obama Over Healthcare Law

House Republicans Vote to Sue Obama Over Healthcare Law

Reuters - US Online Video (July 31, 2014) The Republican-led House of Representatives votes to sue President Obama, accusing him of overstepping his executive authority in making changes to the Affordable Care Act. Mana Rabiee reports. Video provided by Reuters
Powered by NewsLook.com
Despite Health Questions, E-Cigs Are Beneficial: Study

Despite Health Questions, E-Cigs Are Beneficial: Study

Newsy (July 31, 2014) Citing 81 previous studies, new research out of London suggests the benefits of smoking e-cigarettes instead of regular ones outweighs the risks. Video provided by Newsy
Powered by NewsLook.com
Dangerous Bacteria Kills One in Florida

Dangerous Bacteria Kills One in Florida

AP (July 31, 2014) Sarasota County, Florida health officials have issued a warning against eating raw oysters and exposing open wounds to coastal and inland waters after a dangerous bacteria killed one person and made another sick. (July 31) Video provided by AP
Powered by NewsLook.com
Health Insurers' Profits Slide

Health Insurers' Profits Slide

Reuters - Business Video Online (July 30, 2014) Obamacare-related costs were said to be behind the profit plunge at Wellpoint and Humana, but Wellpoint sees the new exchanges boosting its earnings for the full year. Fred Katayama reports. Video provided by Reuters
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:
from the past week

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