Effect of individual components of soy formula and cows milk formula on zinc bioavailability

Journal Article · Thu Nov 01 04:00:00 EST 1984 · Am. J. Clin. Nutr.; (United States)

OSTI ID:5974441

Loennerdal, B; Cederblad, A; Davidsson, L; Sandstroem, B

Zinc absorption from human milk, cows milk formulas, and soy formulas was studied in human adults by a radioisotope technique using /sup 65/Zn and whole body counting. Individual dietary components were investigated for effects on zinc absorption. Phytate was found to have a strong inhibitory effect on zinc absorption; addition of phytate to cows milk formula (yielding a phytate concentration similar to that of soy formula) resulted in a decrease in zinc absorption from 31 to 16% similar to the absorption for soy formula (14%). Carbohydrate source, calcium, and zinc levels of the diet did not affect zinc absorption significantly. Iron supplementation of cows milk formula decreased zinc absorption from 24 to 18% although this decrease was not found to be significant (p less than 0.1). Absorption of zinc from a whey-adjusted cows milk formula was higher (31%) than from a nonmodified cows milk formula (22%). Increasing the zinc supplementation level in cows milk formula but not in soy formula increased zinc absorption to approximate that from breast milk. It is suggested that reduction of phytate content of soy formula may be a more effective avenue of modification than increased level of zinc supplementation.

• Research Organization: Univ. of California, Davis
• OSTI ID: 5974441
• Journal Information: Am. J. Clin. Nutr.; (United States), Journal Name: Am. J. Clin. Nutr.; (United States) Vol. 40:5; ISSN AJCNA
• Country of Publication: United States
• Language: English

Related Subjects

550501 -- Metabolism-- Tracer Techniques
560306* -- Chemicals Metabolism & Toxicology-- Man-- (-1987)
59 BASIC BIOLOGICAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ABSORPTION
ALKALINE EARTH METALS
ANIMALS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BIOLOGICAL AVAILABILITY
BIOLOGICAL EFFECTS
BIOLOGICAL MATERIALS
BODY FLUIDS
CALCIUM
CARBOHYDRATES
CATTLE
COMPARATIVE EVALUATIONS
COUNTING TECHNIQUES
DAYS LIVING RADIOISOTOPES
DIET
DOMESTIC ANIMALS
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTS
ESTERS
EVEN-ODD NUCLEI
FOOD
INDUSTRIAL WASTES
INHIBITION
INTERMEDIATE MASS NUCLEI
INTESTINAL ABSORPTION
IRON
ISOTOPE APPLICATIONS
ISOTOPES
LABELLED COMPOUNDS
MAMMALS
MAN
MATERIALS
METALS
MILK
NUCLEI
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PHOSPHORIC ACID ESTERS
PHYTIC ACID
PLANTS
PRIMATES
RADIOISOTOPES
RESPONSE MODIFYING FACTORS
RUMINANTS
SOYBEANS
TRACER TECHNIQUES
TRANSITION ELEMENTS
UPTAKE
VEGETABLES
VERTEBRATES
WASTES
WHEY
WHOLE-BODY COUNTING
ZINC
ZINC 65
ZINC ISOTOPES