Document Detail


Antioxidant system for the preservation of vitamin A in Ultra Rice.
MedLine Citation:
PMID:  19445263     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Ultra Rice grains are micronutrient-fortified, extruded rice grains designed to address specific nutritional deficiencies in populations where rice is a staple food. Vitamin A and some of the B vitamins, as well as iron and zinc, are target nutrients for fortification through Ultra Rice technology. Vitamin A is sensitive to degradation. Therefore, the original Ultra Rice formulations included stabilizers, some of which were not approved as food additives in all of the receiving markets. OBJECTIVE: To develop a new antioxidant system for improving vitamin A storage stability in Ultra Rice grains, while complying with international food regulations. METHODS: Ten formulations were prepared containing various combinations of hydrophilic and hydrophobic antioxidants, as well as moisture stabilizers. Accelerated vitamin A storage stability tests were conducted at 25 degrees, 35 degrees, and 45 degrees C with 70% to 100% relative humidity. RESULTS: The most stable samples contained one or more phenolic antioxidants, a water-soluble antioxidant, and stabilizing agents. The best results were obtained by using butylated hydroxyanisole (BHA) in combination with butylated hydroxytoluene (BHT) as the hydrophobic antioxidants and ascorbic acid as the hydrophilic antioxidant. Citric acid and sodium tripolyphosphate (STPP) were used to chelate metal ions and to stabilize moisture, respectively. The best formulations retained more than 85% and approximately 70% of the added vitamin A at 25 degrees and 45 degrees C, respectively, after 24 weeks storage. CONCLUSIONS: The best antioxidant system, composed of generally accepted food additives, improved vitamin A stability while reducing the price, thus greatly improving the commercial viability of Ultra Rice grains for use as a ricefortificant.
Authors:
Yao Olive Li; Jane Lam; Levente L Diosady; Shirley Jankowski
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Food and nutrition bulletin     Volume:  30     ISSN:  0379-5721     ISO Abbreviation:  Food Nutr Bull     Publication Date:  2009 Mar 
Date Detail:
Created Date:  2009-05-18     Completed Date:  2009-06-11     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7906418     Medline TA:  Food Nutr Bull     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  82-9     Citation Subset:  IM    
Affiliation:
Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College St., Toronto, ON M5S 3E5, Canada.
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MeSH Terms
Descriptor/Qualifier:
Antioxidants / metabolism*
Ascorbic Acid / metabolism
Butylated Hydroxyanisole / metabolism
Butylated Hydroxytoluene / metabolism
Citric Acid / metabolism
Food Additives / metabolism*
Food Handling / economics,  methods*
Food, Fortified
Metals / metabolism
Oryza sativa / metabolism*
Phenols / metabolism
Polyphosphates / metabolism
Vitamin A / metabolism*
Vitamin A Deficiency / prevention & control
Water / physiology
Chemical
Reg. No./Substance:
0/Antioxidants; 0/Food Additives; 0/Metals; 0/Phenols; 0/Polyphosphates; 10380-08-2/triphosphoric acid; 11103-57-4/Vitamin A; 128-37-0/Butylated Hydroxytoluene; 25013-16-5/Butylated Hydroxyanisole; 50-81-7/Ascorbic Acid; 77-92-9/Citric Acid; 7732-18-5/Water

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


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