Bioavailability of calcium and zinc in a whey mineral complex

The bioavailability of Ca and Zn in a whey mineral complex (WMC) prepared from acid casein whey was determined in rats by slope ratio assay methods. Diets containing graded levels of Ca (45-215 mg/100 g) as WMC or CaCO3 were fed to groups of 6 weanling rats for 27 days. Bioavailability of Ca in WMC...

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Bibliographic Details
Published in:Irish journal of food science and technology 1988, Vol.12 (1/2), p.41-51
Main Authors: Flynn, A, McKenna, L, Kearney, R.D, Connolly, J.F
Format: Article
Language:English
Subjects:
Bioavailability
Calcium
calcium carbonate
Diet
Femur
Minerals
Nutrition
Rats
Tibia
Weight gain
whey
Zinc
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Summary:The bioavailability of Ca and Zn in a whey mineral complex (WMC) prepared from acid casein whey was determined in rats by slope ratio assay methods. Diets containing graded levels of Ca (45-215 mg/100 g) as WMC or CaCO3 were fed to groups of 6 weanling rats for 27 days. Bioavailability of Ca in WMC relative to CaCO3 was determined from the ratio of the slopes of the linear regressions for femur and tibia Ca on Ca intake. The relative bioavailability of Ca in CaCO3 was 0.88-0.97. For assay of Zn bioavailability, diets containing graded levels of Zn (1.2-7.7 mg/kg) as WMC or ZnSO4 were fed to groups of 6 weanling rats for 19 days. Relative bioavailability of Zn in WMC was 0.87-0.91, as determined from the ratio of the slopes of the linear regressions for weight gain and tibia Zn on Zn intake. The high bioavailability of Ca and Zn in WMC indicates that this complex may be suitable for use as a dietary mineral supplement.
ISSN:0332-0375