Featured Research

from universities, journals, and other organizations

Dietary Protein And Bone Health Revisited

Date:
April 11, 2005
Source:
USDA / Agricultural Research Service
Summary:
Agricultural Research Service (ARS) scientists first compared high-meat protein diets with low-meat protein diets. Now, they've compared animal-protein diets with vegetable-protein diets. This "sequel" study rocks the foundation, again, of a commonly held belief that high-protein diets can be bad for bones.

Aboard the Mobile Nutrition Research Laboratory, nutritionist Fariba Roughead (right) and nurse Ruth Christianson (middle) prepare volunteer Sue Cherette (on table) for measurement of her body composition with a dual x-ray absorptiometer. Roughead is conducting a study to determine whether supplements containing calcium, copper, and zinc are more effective than those containing only calcium in maintaining bone density of premenopausal women.
Credit: Photo by Stephen Ausmus

Agricultural Research Service (ARS) scientists first compared high-meat protein diets with low-meat protein diets. Now, they've compared animal-protein diets with vegetable-protein diets. This "sequel" study rocks the foundation, again, of a commonly held belief that high-protein diets can be bad for bones.

ARS scientists in the Grand Forks [N.D.] Human Nutrition Research Center conducted the study. The findings were published in January in The Journal of Clinical Endocrinology & Metabolism. ARS is the U.S. Department of Agriculture's chief scientific research agency.

Nutritionists Zamzam (Fariba) Roughead and Janet Hunt, with colleagues, carefully controlled the diets of 13 healthy, postmenopausal women. Two seven-week experimental diets were provided to each of the volunteers. A two-week break was scheduled between each of the two diet phases.

Both diets provided 15 percent of energy--or daily caloric intake--from protein, a percentage that represents average U.S. consumption. One diet contained mostly meat protein, and the other substituted 25 grams of high-isoflavone soy protein for an equivalent amount of the meat protein provided daily. The remainder of each diet was mixed to represent typical daily intakes of calcium and other nutrients.

The scientists measured biomarkers in blood and urine collected during each seven-week diet phase and found no indications of differences in calcium or bone metabolism after eating either diet. Moreover, the soy-protein-substituted diet did not change the absorption or excretion of calcium.

Some scientists long have theorized that high-meat protein diets can leach calcium from bones. Others theorize that the phytate, a component of soy protein, can interrupt mineral absorption in general.

The study's findings suggest that calcium absorption from these two important sources of dietary protein is similar.


Story Source:

The above story is based on materials provided by USDA / Agricultural Research Service. Note: Materials may be edited for content and length.


Cite This Page:

USDA / Agricultural Research Service. "Dietary Protein And Bone Health Revisited." ScienceDaily. ScienceDaily, 11 April 2005. <www.sciencedaily.com/releases/2005/03/050325185155.htm>.
USDA / Agricultural Research Service. (2005, April 11). Dietary Protein And Bone Health Revisited. ScienceDaily. Retrieved April 25, 2014 from www.sciencedaily.com/releases/2005/03/050325185155.htm
USDA / Agricultural Research Service. "Dietary Protein And Bone Health Revisited." ScienceDaily. www.sciencedaily.com/releases/2005/03/050325185155.htm (accessed April 25, 2014).

Share This



More Health & Medicine News

Friday, April 25, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Deadly Fungus Killing Bats, Spreading in US

Deadly Fungus Killing Bats, Spreading in US

AP (Apr. 24, 2014) A disease that has killed more than six million cave-dwelling bats in the United States is on the move and wildlife biologists are worried. White Nose Syndrome, discovered in New York in 2006, has now spread to 25 states. (April 24) Video provided by AP
Powered by NewsLook.com
Companies Ramp Up Wellness to Lower Health Costs

Companies Ramp Up Wellness to Lower Health Costs

AP (Apr. 24, 2014) That little voice telling you to exercise, get in shape and get healthy is probably coming from your boss. More companies are beefing up wellness programs to try and cut down their health care costs. (April 24) Video provided by AP
Powered by NewsLook.com
Blood From World's Oldest Woman Suggests Life Limit

Blood From World's Oldest Woman Suggests Life Limit

Newsy (Apr. 24, 2014) Scientists say for the extremely elderly, their stem cells might reach a state of exhaustion. This could limit one's life span. Video provided by Newsy
Powered by NewsLook.com
FDA Wants To Ban Sales Of E-Cigarettes To Minors

FDA Wants To Ban Sales Of E-Cigarettes To Minors

Newsy (Apr. 24, 2014) The Food and Drug Administration wants to crack down on the use of e-cigarettes, banning the sale of the product to minors. 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:
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