Featured Research

from universities, journals, and other organizations

New Method Shows Mushrooms A Top Source For One Antioxidant

Date:
September 12, 2005
Source:
Penn State
Summary:
Using a new, more sensitive-testing approach they developed for fungi, Penn State food scientists have found that mushrooms are a better natural source of the antioxidant ergothioneine than either of the two dietary sources previously believed to be best.

Using a new, more sensitive-testing approach they developed for fungi,Penn State food scientists have found that mushrooms are a betternatural source of the antioxidant ergothioneine than either of the twodietary sources previously believed to be best.

The researchers found that white button mushrooms, the mostcommonly consumed kind in the U.S., have about 12 times more of theantioxidant than wheat germ and 4 times more than chicken liver, theprevious top-rated ergothioneine sources based on available data. Untilthe Penn State researchers developed their testing approach, known asan assay, there was no method employing the most sensitive moderninstrumentation and analytical techniques to quantify the amount ofergothioneine in fungi. The researchers say that their assay can beused for other plants, too, not just mushrooms.

Joy Dubost, doctoral candidate in food science, who conducted thestudy, says, "Numerous studies have shown that consuming fruits andvegetables which are high in antioxidants may reduce the risk ofdeveloping chronic diseases. Ergothioneine, a unique metaboliteproduced by fungi, has been shown to have strong antioxidant propertiesand to provide cellular protection within the human body." Dubostdetailed the new assay and the amounts of ergothioneine in the mostcommon and exotic mushrooms typically available in U.S. food stores ina paper presented today (Aug. 31) at the 230th American ChemicalSociety meeting in Washington, D. C. Her paper is Identification andQuantification of Ergothioneine in Cultivated Mushrooms by LiquidChromatography-Mass Spectroscopy. Her co-authors are Dr. Robert B.Beelman, professor of food science; Dr. Devin G. Peterson, assistantprofessor of food science, and Dr. Daniel J. Royse, professor of plantpathology.

The Penn State researchers found that among the most commonly consumedmushrooms, portabellas and criminis have the most ergothioneine,followed closely by the white buttons. A standard 3-ounce USDA servingof these mushrooms, about the amount you'd put on a cheese steak ormushroom-topped burger, supplies up to 5 milligrams.

The exotic mushrooms have even more ergothioneine. The same standardserving size of shiitake, oyster, king oyster or maitake (hen of thewoods) can contain up to 13mg in a 3-ounce serving or about 40 times asmuch as wheat germ.

Dubost notes that the levels of ergothioneine do not decrease when the mushrooms are cooked.

In developing their new assay, the researchers adapted an assay used toquantify the amount of ergothioneine in bovine ocular tissue. They usedhigh performance liquid chromatography (HPLC), a UV-VIS detector andmass spectroscopy, instruments normally used in analytical chemistry.

###

The Penn State Experiment Station and Mushroom Endowment Fund supportedthe study. The Mushroom Council and NutriCore Northeast are supportingthe Penn State's team's continuing research in this area.


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. "New Method Shows Mushrooms A Top Source For One Antioxidant." ScienceDaily. ScienceDaily, 12 September 2005. <www.sciencedaily.com/releases/2005/09/050912080429.htm>.
Penn State. (2005, September 12). New Method Shows Mushrooms A Top Source For One Antioxidant. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2005/09/050912080429.htm
Penn State. "New Method Shows Mushrooms A Top Source For One Antioxidant." ScienceDaily. www.sciencedaily.com/releases/2005/09/050912080429.htm (accessed July 31, 2014).

Share This




More Plants & Animals News

Thursday, July 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Visitors Feel Part of the Pack at Wolf Preserve

Visitors Feel Part of the Pack at Wolf Preserve

AP (July 31, 2014) Seacrest Wolf Preserve on the northern Florida panhandle allows more than 10,000 visitors each year to get up close and personal with Arctic and British Columbian Wolves. (July 31) Video provided by AP
Powered by NewsLook.com
Florida Panther Rebound Upsets Ranchers

Florida Panther Rebound Upsets Ranchers

AP (July 31, 2014) With Florida's panther population rebounding, some ranchers complain the protected predators are once again killing their calves. (July 31) Video provided by AP
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
Raw: Thousands Flocking to German Crop Circle

Raw: Thousands Flocking to German Crop Circle

AP (July 30, 2014) Thousands of people are trekking to a Bavarian farmer's field to check out a mysterious set of crop circles. (July 30) Video provided by AP
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