Document Detail


Iron bioavailability in infants from an infant cereal fortified with ferric pyrophosphate or ferrous fumarate.
MedLine Citation:
PMID:  10837304     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Infant cereals are commonly fortified with insoluble iron compounds with low relative bioavailability, such as ferric pyrophosphate, because of organoleptic changes that occur after addition of water-soluble iron sources. OBJECTIVE: Our objective was to compare iron bioavailability from ferric pyrophosphate with an alternative iron source that is soluble in dilute acid, ferrous fumarate, and to evaluate the influence of ascorbic acid on iron bioavailability from ferrous fumarate in infants. DESIGN: Iron bioavailability was measured as the incorporation of stable iron isotopes into erythrocytes 14 d after administration of labeled test meals (25 g dry wheat and soy infant cereal, 100 g water, and 2.5 mg Fe as [57Fe]ferric pyrophosphate or [57Fe]ferrous fumarate). Ascorbic acid was added to all test meals (25 mg in study 1 or 25 or 50 mg in study 2). Infants were fed each test meal on 4 consecutive days under standardized conditions. The 2 different test meals within each study were administered 2 wk apart in a crossover design. RESULTS: Geometric mean iron bioavailability was significantly higher from [57Fe]ferrous fumarate than from [57Fe]ferric pyrophosphate [4.1% (range: 1.7-14.7%) compared with 1.3% (range: 0. 7-2.7%); n = 8, P = 0.008]. In this study, doubling the ascorbic acid content did not further enhance iron bioavailability; the geometric means (range) were 3.4% (1.9-6.6%) and 4.2% (1.2-18.7%) for the test meals with 25 and 50 mg ascorbic acid added, respectively (n = 9). CONCLUSION: Iron bioavailability from iron-fortified infant cereals can be improved by using an iron compound with high relative bioavailability and by ensuring adequate ascorbic acid content of the product.
Authors:
L Davidsson; P Kastenmayer; H Szajewska; R F Hurrell; D Barclay
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Publication Detail:
Type:  Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  The American journal of clinical nutrition     Volume:  71     ISSN:  0002-9165     ISO Abbreviation:  Am. J. Clin. Nutr.     Publication Date:  2000 Jun 
Date Detail:
Created Date:  2000-07-14     Completed Date:  2000-07-14     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0376027     Medline TA:  Am J Clin Nutr     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1597-602     Citation Subset:  AIM; IM    
Affiliation:
Laboratory for Human Nutrition, Institute of Food Science, Swiss Federal Institute of Technology, R]uschlikon, Switzerland. davidsson@ilw.agrl.ethz.ch
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MeSH Terms
Descriptor/Qualifier:
Biological Availability
Cereals*
Diphosphates / administration & dosage*
Erythrocytes / metabolism
Female
Ferrous Compounds / administration & dosage*
Food, Fortified*
Humans
Infant
Infant Food*
Iron / administration & dosage*,  blood,  pharmacokinetics*
Iron Isotopes
Male
Soybeans
Triticum
Chemical
Reg. No./Substance:
0/Diphosphates; 0/Ferrous Compounds; 0/Iron Isotopes; 10058-44-3/ferric pyrophosphate; 141-01-5/ferrous fumarate; 7439-89-6/Iron

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