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.

Related Articles


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 March 31, 2015 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 March 31, 2015).

Share This


More From ScienceDaily



More Health & Medicine News

Tuesday, March 31, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Soda, Salt and Sugar: The Next Generation of Taxes

Soda, Salt and Sugar: The Next Generation of Taxes

Washington Post (Mar. 30, 2015) — Denisa Livingston, a health advocate for the Dinι Community Advocacy Alliance, and the Post&apos;s Abby Phillip discuss efforts around the country to make unhealthy food choices hurt your wallet as much as your waistline. Video provided by Washington Post
Powered by NewsLook.com
UnitedHealth Buys Catamaran

UnitedHealth Buys Catamaran

Reuters - Business Video Online (Mar. 30, 2015) — The $12.8 billion merger will combine the U.S.&apos; third and fourth largest pharmacy benefit managers. Analysts say smaller PBMs could also merge. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
S. Leone in New Anti-Ebola Lockdown

S. Leone in New Anti-Ebola Lockdown

AFP (Mar. 28, 2015) — Sierra Leone imposed a three-day nationwide lockdown Friday for the second time in six months in a bid to prevent a resurgence of the deadly Ebola virus. Duration: 01:17 Video provided by AFP
Powered by NewsLook.com
These Popular Antibiotics Can Cause Permanent Nerve Damage

These Popular Antibiotics Can Cause Permanent Nerve Damage

Newsy (Mar. 27, 2015) — A popular class of antibiotic can leave patients in severe pain and even result in permanent nerve damage. 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