Navigation Links
Polyphenol antioxidants inhibit iron absorption
Date:8/23/2010

University Park, Pa. Health benefits from polyphenol antioxidants substances found in many fruits and vegetables may come at a cost to some people. Penn State nutritional scientists found that eating certain polyphenols decreased the amount of iron the body absorbs, which can increase the risk of developing an iron deficiency.

"Polyphenols have been known to have many beneficial effects for human health, such as preventing or delaying certain types of cancer, enhancing bone metabolism and improving bone mineral density, and decreasing risk of heart disease," said Okhee Han, assistant professor of nutritional sciences. "But so far, not many people have thought about whether or not polyphenols affect nutrient absorption."

The researchers, led by Han, studied the effects of eating grape seed extract and epigallocatechin-3-gallate (EGCG) found in green tea. They used cells from the intestine where iron absorption takes place to assess the polyphenols' effect and found that polyphenols bind to iron in the intestinal cells, forming a non-transportable complex. This iron-polyphenol complex cannot enter the blood stream. Instead, it is excreted in the feces when cells are sloughed off and replaced.

Iron is necessary to carry oxygen from the lungs throughout the body and for other cellular functions. People already at risk for iron deficiency increase that risk if they consume high amounts of grape seed extract or EGCG.

"Iron deficiency is the most prevalent nutrient deficiency in the world, especially in developing countries where meats are not plentiful," said Han. "People at high risk of developing iron deficiency such as pregnant women and young children should be aware of what polyphenols they are consuming."

Han and her colleagues looked at the heme form of iron found in meats, poultry, and fish. Last year, they performed similar research with non-heme iron found in plants. They published the results of their stu
'/>"/>

Contact: Liam Jackson
lnj104@psu.edu
814-863-4325
Penn State
Source:Eurekalert

Page: 1 2

Related biology news :

1. Mounting evidence shows health benefits of grape polyphenols
2. Want to slow aging? New research suggests it takes more than antioxidants
3. Antioxidants do help arteries stay healthy
4. Well-defined quantity of antioxidants in diet can improve insulin resistance
5. University of Colorado study shows natural antioxidants give top barn swallows a leg on competitors
6. Antioxidants arent always good for you and can impair muscle function, study shows
7. Scientists discover influenzas Achilles heel: Antioxidants
8. Antioxidants in Midwestern black raspberries influenced by production site
9. Forget the antioxidants? McGill researchers cast doubt on role of free radicals in aging
10. Purple tomatoes: The richness of antioxidants against tumors
11. Research shows Brazilian acai berry antioxidants absorbed by human body
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/19/2015)... , May 19, 2015 ... announced the addition of the  "Genetic Testing ... ,     (Logo: http://photos.prnewswire.com/prnh/20130307/600769) , ,A recent report, ... in-depth analysis of the current and future ... gene-based tests, their working principles and types ...
(Date:5/11/2015)... -- Through a well-rounded UAS delegation representing private industry, government, and ... at AUVSI,s Unmanned 2015 conference last week in ... UAS industry met with over 200 hundred people from ... UAS ecosystem. "Our message is clear and ... Rich Knoll . "If you want to fly UAS, ...
(Date:5/6/2015)... , May 6, 2015 LifeBEAM, a ... established helmet producer, announced today that they will expand ... the world,s first bio-sensing cycling helmet and the first ... in two new colors in order to give cyclists ... product. In addition, LifeBEAM and Lazer announced their plan ...
Breaking Biology News(10 mins):Global Genetic Testing Market Outlook 2018 2Ohio Flies High at Unmanned '15, Sets Stage for Ohio UAS Conference 2LifeBEAM and Lazer Announce Expanded Partnership in Bio-Sensing Sports Gear 2LifeBEAM and Lazer Announce Expanded Partnership in Bio-Sensing Sports Gear 3
... Protein Structure Initiative (PSI) has established efficient pipelines for ... new mechanisms for sharing the resources it has developed ... effort, which started in 2000 and is sponsored by ... Medical Sciences, funded a materials repository in September. Next ...
... could become a valuable tool for predicting the risk ... to investigators at St. Jude Children's Research Hospital. ... the immediate injury done by radiation therapy to the ... of soft-tissue cancer. This also indicates that MRI might ...
... at the Consejo Superior de Investigaciones Científicas (CSIC) has ... in plant cells, a discovery that will enable the ... can be used to produce oral vaccines which, upon ... Moreover, this discovery opens the door to the design ...
Cached Biology News:Protein structure initiative launches new resources for the scientific community 2Protein structure initiative launches new resources for the scientific community 3New way of tracking muscle damage from radiation 2Vaccine-producing 'plant-factories' 2
(Date:5/28/2015)... GAITHERSBURG, Md. , May 28, 2015  GenVec, ... president and CEO, Douglas J. Swirsky , will ... Healthcare Conference at 11 a.m. EDT on Thursday, June ... webcast of Mr. Swirsky,s presentation will be available at ... also be available on GenVec,s website.  To access, visit ...
(Date:5/28/2015)... 2015 Glenn Keet, CEO of ... of EMR/EHR Clinical Data Integration with EDC Systems ” ... Washington, DC on June 14th-18th. , During the presentation, ... systems with EDC, and will examine the value of ... and electronic health records/electronic medical records integration. , ...
(Date:5/28/2015)... Georgia (PRWEB) May 28, 2015 ... National Laboratory (Oak Ridge, TN) recently signed ... of 3D printing plastic resins using nanocellulose, a ... constraint of 3D printing is the limited number ... provide inadequate mechanical strength to printed parts for ...
(Date:5/28/2015)... Clinerion, an eClinical technology ... the Alliance for Clinical Research Excellence and ... operating in the public interest and dedicated ... quality, safety, integrity and operational effectiveness in ... pleased to announce their partnership for accelerating ...
Breaking Biology Technology:GenVec To Present At The Jefferies Healthcare Conference 2Clinovo Presents at the DIA 2015 51st Annual Meeting in Washington, DC on June 14th-18th 2American Process Inc. Announces Partnership with Oak Ridge National Laboratory to Make 3D Printing Plastic Resins Stronger and More Sustainable 2American Process Inc. Announces Partnership with Oak Ridge National Laboratory to Make 3D Printing Plastic Resins Stronger and More Sustainable 3Clinerion and ACRES Partner on Patient Recruitment and Risk-Based Quality Management 2Clinerion and ACRES Partner on Patient Recruitment and Risk-Based Quality Management 3
... of Calgary, Faculty of Medicine scientists who proved it is ... on a silicon chip or the brain on a ... technology that monitors brain cell activity at a resolution never ... Canada (NRC), the new silicon chips are also simpler to ...
... 2010 -- Superconducting materials, which transmit power resistance-free, ... low-charge density varies on the nanoscale level, according ... Oak Ridge National Laboratory. In ... superconductivity, the ORNL scientists rewrote computational code for ...
... Prison-based programs to de-radicalize terrorists show promise, if well-run, ... researchers. Their initial findings the most comprehensive to ... presented at a conference this week. Prisons ... joint report of the National Consortium for the Study ...
Cached Biology Technology:Neurochip technology developed by Canadian team 2Award-winning supercomputer application solves superconductor puzzle 2Terrorist de-radicalization shows promise, comprehensive study finds 2