Featured Research

from universities, journals, and other organizations

Researchers see added nutritional benefits in organic milk

Date:
December 11, 2013
Source:
Washington State University
Summary:
A team of researchers has found that organic milk contains significantly higher concentrations of heart-healthy fatty acids compared to milk from cows on conventionally managed dairy farms. While all types of milk fat can help improve an individual's fatty acid profile, the team concludes that organic whole milk does so even better. The study is the first large-scale, US-wide comparison of organic and conventional milk.

Washington State University research professor Chuck Benbrook led a team that found organic milk contains significantly higher concentrations of heart-healthy fatty acids compared to milk from cows on conventionally managed dairy farms.
Credit: Washington State University

A team led by a Washington State University researcher has found that organic milk contains significantly higher concentrations of heart-healthy fatty acids compared to milk from cows on conventionally managed dairy farms. While all types of milk fat can help improve an individual's fatty acid profile, the team concludes that organic whole milk does so even better.

The study is the first large-scale, U.S.-wide comparison of organic and conventional milk, testing nearly 400 samples of organic and conventional milk over an 18-month period. Conventional milk had an average omega-6 to omega-3 fatty acid ratio of 5.8, more than twice that of organic milk's ratio of 2.3. The researchers say the far healthier ratio of fatty acids in organic milk is brought about by a greater reliance on pasture and forage-based feeds on organic dairy farms.

A large body of research has shown that grass and legume forages promote cow health and improve the fatty acid profile in organic dairy products. Still, said WSU researcher Dr. Charles Benbrook, the study's lead author, "We were surprised by the magnitude of the nutritional quality differences we documented in this study."

After fruits and vegetables, dairy products are the largest category of the growing, $29 billion organic food sector, according to the Organic Trade Association's 2013 Organic Industry Survey. Organic milk and cream sales were worth $2.622 billion, the survey found. Overall, organic milk accounted for 4 percent of fluid milk sales last year, according to the Milk Processor Education Program.

The consumption of more omega-6 fatty acids than omega-3 fatty acids is a well-known risk factor for a variety of health problems, including cardiovascular disease, cancer, excessive inflammation, and autoimmune diseases. The higher the ratio of omega-6 to omega-3, the greater the associated health risk.

Western diets typically have a ratio of about 10-to-1 to 15-to-1, while a ratio of 2.3-to-1 is thought to maximize heart health. The team modeled a hypothetical diet for adult women with a baseline omega-6 to omega-3 ratio of 11.3, and looked at how far three interventions could go in reducing the ratio to 2.3.

They found that almost 40 percent of the needed nine-point drop could be achieved by switching from three daily servings of conventional dairy products to 4.5 daily servings of mostly full-fat organic dairy products. Women who also avoid a few foods each day that are high in omega-6 fatty acids can lower their fatty acid ratio to around 4, 80 percent of the way to the 2.3 goal.

"Surprisingly simple food choices can lead to much better levels of the healthier fats we see in organic milk," says Benbrook.

The team also compared the fatty acids in dairy products to those in fish. "We were surprised to find that recommended intakes of full-fat milk products supply far more of the major omega-3 fatty acid, ALA, than recommended servings of fish," says co-author and WSU research associate Donald R. Davis. Conventional milk had about nine times more ALA than fish while organic milk had 14 times more, he says. Organic milk is also a significant source of two other omega-3 fatty acids, EPA and DPA, but not DHA.


Story Source:

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


Journal Reference:

  1. Charles M. Benbrook, Gillian Butler, Maged A. Latif, Carlo Leifert, Donald R. Davis. Organic Production Enhances Milk Nutritional Quality by Shifting Fatty Acid Composition: A United States–Wide, 18-Month Study. PLoS ONE, 2013; 8 (12): e82429 DOI: 10.1371/journal.pone.0082429

Cite This Page:

Washington State University. "Researchers see added nutritional benefits in organic milk." ScienceDaily. ScienceDaily, 11 December 2013. <www.sciencedaily.com/releases/2013/12/131211134235.htm>.
Washington State University. (2013, December 11). Researchers see added nutritional benefits in organic milk. ScienceDaily. Retrieved October 21, 2014 from www.sciencedaily.com/releases/2013/12/131211134235.htm
Washington State University. "Researchers see added nutritional benefits in organic milk." ScienceDaily. www.sciencedaily.com/releases/2013/12/131211134235.htm (accessed October 21, 2014).

Share This



More Plants & Animals News

Tuesday, October 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

White Lion Cubs Born in Belgrade Zoo

White Lion Cubs Born in Belgrade Zoo

AFP (Oct. 20, 2014) Two white lion cubs, an extremely rare subspecies of the African lion, were recently born at Belgrade Zoo. They are being bottle fed by zoo keepers after they were rejected by their mother after birth. Duration: 00:42 Video provided by AFP
Powered by NewsLook.com
Traditional Farming Methods Gaining Ground in Mali

Traditional Farming Methods Gaining Ground in Mali

AFP (Oct. 20, 2014) He is leading a one man agricultural revolution in Mali - Oumar Diatabe uses traditional farming methods to get the most out of his land and is teaching others across the country how to do the same. Duration: 01:44 Video provided by AFP
Powered by NewsLook.com
Goliath Spider Will Give You Nightmares

Goliath Spider Will Give You Nightmares

Buzz60 (Oct. 20, 2014) An entomologist stumbled upon a South American Goliath Birdeater. With a name like that, you know it's a terrifying creepy crawler. Sean Dowling (@SeanDowlingTV) has the details. Video provided by Buzz60
Powered by NewsLook.com
Adorable Video of Baby Rhino and Lamb Friend Playing

Adorable Video of Baby Rhino and Lamb Friend Playing

Buzz60 (Oct. 20, 2014) Gertjie the Rhino and Lammie the Lamb are teaching the world about animal conservation and friendship. TC Newman (@PurpleTCNewman) has the adorable video! Video provided by Buzz60
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


Plants & Animals

Earth & Climate

Fossils & Ruins

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