| Phytate, calcium, iron, and zinc contents and their molar ratios in foods commonly consumed in China. | |
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MedLine Citation:
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PMID: 16366728 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A total of 60 food samples commonly consumed in China were analyzed for phytate using the anion-exchange method and for calcium, iron, and zinc using atomic absorption spectrophotometry. The foods analyzed included those based on cereal grains and soybean. Phytate contents expressed on a wet weight basis ranged from 0 for foods made from starches to 1878 mg/100 g for dried stick-shaped soybean milk film. The calcium contents were between 2.08 mg/100 g for ground corn and 760.67 mg/100 g for diced fried soybean curd. The lowest values of iron and zinc were 0.04 mg/100 g for Panjin pearl rice cooked with discarding extra water and 0.08 mg/100 g for potato and bean starches, while the highest values of iron and zinc were observed in dried stick-shaped soybean milk film. Although many foods were relatively rich in calcium, zinc, and iron, many also contained a higher level of phytate. Of the 60 food samples, 34 foods had a phytate/calcium molar ratio >0.24, 53 foods had a phytate/iron molar ratio >1, 31 foods had a phytate/zinc molar ratio >15, and only 7 foods had a phytate x calcium/zinc >200. Phytate in foods impair the bioavailability of calcium, iron, and zinc, which to some extent depends upon food processing and cooking methods. |
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Authors:
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Guansheng Ma; Ying Jin; Jianhua Piao; Frans Kok; Bonnema Guusje; Evert Jacobsen |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of agricultural and food chemistry Volume: 53 ISSN: 0021-8561 ISO Abbreviation: J. Agric. Food Chem. Publication Date: 2005 Dec |
Date Detail:
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Created Date: 2005-12-21 Completed Date: 2006-02-03 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0374755 Medline TA: J Agric Food Chem Country: United States |
Other Details:
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Languages: eng Pagination: 10285-90 Citation Subset: IM |
Affiliation:
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National Institute for Food Safety and Nutrition, Chinese Center for Disease Control and Prevention, Beijing 100050, China. mags@chinacdc.net.cn |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Biological Availability Calcium, Dietary / analysis*, pharmacokinetics Cereals / chemistry China Food Analysis* Iron, Dietary / analysis*, pharmacokinetics Oryza sativa / chemistry Phytic Acid / analysis*, pharmacology Quality Control Soybeans / chemistry Starch / chemistry Triticum / chemistry Zea mays / chemistry Zinc / analysis*, pharmacokinetics |
| Chemical | |
Reg. No./Substance:
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0/Calcium, Dietary; 0/Iron, Dietary; 7440-66-6/Zinc; 83-86-3/Phytic Acid; 9005-25-8/Starch |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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