Phytic acid reduction in soy protein improves zinc bioavailability

Conference · Thu Mar 14 23:00:00 EST 1991 · FASEB Journal (Federation of American Societies for Experimental Biology); (United States)

OSTI ID:5146253

Zhou, J R; Wong, M S; Burns, R A; Erdman, Jr, J W ^[1]

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1. Univ. of Illinois, Urbana (United States) Mead Johnson Research Center, Evansville, IN (United States)

The objective of this study was to confirm previous studies that have suggested that reduction of phytic acid in soy improved zinc bioavailability (BV). Two commercially-produced soybean isolates containing either a normal phytic acid level or a reduced level were formulated into diets so as to provide 6 or 9 ppm zinc. Control diets were egg white protein-based and contained 3, 6 or 9 ppm zinc from zinc carbonate. Weanling male rats were fed these diets for 21 days and food intake and weight gain monitored. Slope ratio analysis of total tibia zinc content compared to total zinc intake revealed that zinc BV from reduced phytic acid soy isolate-containing diets was indistinguishable from control egg white diets. In contrast, zinc BV from normal soy isolate diets was significantly reduced compared to reduced phytic acid and control diets. These results coupled with other results indicate that phytic acid is the inhibitory factor in soybean products that results in reduced zinc BV.

• OSTI ID: 5146253
• Report Number(s): CONF-9104107--
• Journal Information: FASEB Journal (Federation of American Societies for Experimental Biology); (United States), Journal Name: FASEB Journal (Federation of American Societies for Experimental Biology); (United States) Vol. 5:5; ISSN FAJOE; ISSN 0892-6638
• Country of Publication: United States
• Language: English

Related Subjects

560300* -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
BIOLOGICAL AVAILABILITY
BIOLOGICAL EFFECTS
ELEMENTS
ESTERS
FOOD
MAMMALS
METABOLISM
METALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PHOSPHORIC ACID ESTERS
PHYTIC ACID
PLANTS
RATS
RODENTS
SOYBEANS
VEGETABLES
VERTEBRATES
ZINC