Document Detail

In vitro solubility of calcium, iron and zinc in relation to phytic acid levels in rice-based consumer products in China.
MedLine Citation:
PMID:  19919509     Owner:  NLM     Status:  MEDLINE    
In vitro solubility of calcium, iron and zinc in relation to phytic acid (PA) levels in 30 commercial rice-based foods from China was studied. Solubility of minerals and molar ratios of PA to minerals varied with degrees of processing. In primary products, [PA]/[Ca] values were less than 5 and [PA]/[Fe] and [PA]/[Zn] similarly ranged between 5 and 74, with most values between 20 and 30. [PA]/[mineral] molar ratios in intensively processed products were lower. Solubility of calcium ranged from 0% to 87%, with the lowest in brown rice (12%) and the highest in infant foods (50%). Iron solubility in two-thirds of samples was lower than 30%, and that of zinc narrowly ranged from 6% to 30%. Solubility of minerals was not significantly affected by [PA]/[mineral]. At present, neither primary nor intensively processed rice-based products are good dietary sources of minerals. Improvements should be attempted by dephytinization, mineral fortification or, preferably, combination of both.
Jianfen Liang; Bei-Zhong Han; M J Robert Nout; Robert J Hamer
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  International journal of food sciences and nutrition     Volume:  61     ISSN:  1465-3478     ISO Abbreviation:  Int J Food Sci Nutr     Publication Date:  2010 Feb 
Date Detail:
Created Date:  2010-01-18     Completed Date:  2010-04-28     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9432922     Medline TA:  Int J Food Sci Nutr     Country:  England    
Other Details:
Languages:  eng     Pagination:  40-51     Citation Subset:  IM    
College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China.
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MeSH Terms
Biological Availability
Calcium / chemistry
Calcium, Dietary*
Food Handling
Intestinal Absorption
Iron / chemistry
Iron, Dietary*
Minerals / analysis,  chemistry
Oryza sativa / chemistry*
Phytic Acid / analysis,  chemistry*
Zinc / chemistry
Reg. No./Substance:
0/Calcium, Dietary; 0/Iron, Dietary; 0/Minerals; 7439-89-6/Iron; 7440-66-6/Zinc; 7440-70-2/Calcium; 83-86-3/Phytic Acid

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