Document Detail


Daidzein and genistein contents of vegetables.
MedLine Citation:
PMID:  11177186     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Food samples (n 114) were prepared from vegetables commonly eaten in Europe. The glycosidic forms of the phyto-oestrogens daidzein and genistein were extracted from the dried foods into aqueous methanol. The isoflavones were quantified by GC-MS after hydrolytic removal of any conjugated carbohydrate. Completeness of extraction and any procedural losses of the isoflavones were accounted for using synthetic daidzin (7-O-glucosyl-4'-hydroxyisoflavone) and genistin (7-O-glucosyl-4'5-dihydroxyisoflavone) as internal standards. Of the 114 foods assayed, at a limit of quantification of 0.1 microg/kg dry weight, forty-eight contained no detectable daidzein or genistein, forty-one contained less than 100 microg/kg of the two isoflavones combined and the remaining twenty-five contained more than this amount. Soyabean products contained between 470 and 1420 mg (average of 960 mg) daidzein and genistein combined per kg wet weight of food, and legumes contained between 20 and 5750 microg/kg wet weight of food, with an average of 620 microg/kg. Cooking by boiling in water caused a decrease in the daidzein and genistein content of food in twenty-four of twenty-eight foods. The extent of the decrease was variable and warrants further investigation. The present paper comprises the first comprehensive description of the content of daidzein and genistein in vegetables.
Authors:
J Liggins; L J Bluck; S Runswick; C Atkinson; W A Coward; S A Bingham
Related Documents :
11568456 - Selenium (se) from high-selenium broccoli is utilized differently than selenite, selena...
17333396 - Commercial soy protein ingredients as isoflavone sources for functional foods.
15769136 - Comparative studies of the quantification of genetically modified organisms in foods pr...
20180046 - Selenium level surveillance for the year 2007 of keshan disease in endemic areas and an...
15004276 - Chicxulub impact predates the k-t boundary mass extinction.
21529236 - Behavioral differences between urban feeding groups of neutered and sexually intact fre...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  The British journal of nutrition     Volume:  84     ISSN:  0007-1145     ISO Abbreviation:  Br. J. Nutr.     Publication Date:  2000 Nov 
Date Detail:
Created Date:  2001-02-22     Completed Date:  2001-03-15     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0372547     Medline TA:  Br J Nutr     Country:  England    
Other Details:
Languages:  eng     Pagination:  717-25     Citation Subset:  IM    
Affiliation:
Medical Research Council, Dunn Human Nutrition Unit, Wellcome Trust/MRC Building, Hills Road, Cambridge CB2 2XY, UK.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Estrogens, Non-Steroidal / analysis*
Female
Food Analysis / methods*
Genistein / analysis*
Humans
Isoflavones / analysis*
Male
Vegetables / chemistry*
Chemical
Reg. No./Substance:
0/Estrogens, Non-Steroidal; 0/Isoflavones; 446-72-0/Genistein; 486-66-8/daidzein

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Age-related changes in plasma lycopene concentrations, but not in vitamin E, are associated with fat...
Next Document:  Selenium influences growth via thyroid hormone status in broiler chickens.