Document Detail

Phytate, calcium, iron, and zinc contents and their molar ratios in foods commonly consumed in China.
MedLine Citation:
PMID:  16366728     Owner:  NLM     Status:  MEDLINE    
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.
Guansheng Ma; Ying Jin; Jianhua Piao; Frans Kok; Bonnema Guusje; Evert Jacobsen
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  53     ISSN:  0021-8561     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2005 Dec 
Date Detail:
Created Date:  2005-12-21     Completed Date:  2006-02-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  10285-90     Citation Subset:  IM    
National Institute for Food Safety and Nutrition, Chinese Center for Disease Control and Prevention, Beijing 100050, China.
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MeSH Terms
Biological Availability
Calcium, Dietary / analysis*,  pharmacokinetics
Cereals / chemistry
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
Reg. No./Substance:
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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