Effect of casein phosphopeptides on zinc and calcium absorption from bread meals

Journal of Trace Elements in Medicine and Biology : Organ of the Society for Minerals and Trace Elements (GMS)
M HansenS S Sørensen

Abstract

Animal studies suggest that casein phosphopeptides (CPP), formed by proteolytic digestion of casein, have a positive effect on Ca availability. The aim of this study was to investigate the ability of CPP to improve Zn and Ca absorption from phytate-containing bread meals. Secondly, it was tested whether the Ca content of the meal influenced the effect of CPP on Zn absorption from a high-phytate meal. Zn and Ca absorption from single model meals was determined by extrinsic labeling with 65Zn and 47Ca and measurement of whole-body retention. Thirty-one healthy adults (19-30 y) divided into three groups received one of three meal types based on white-wheat rolls with different phytate and Ca content: A: low-phytate/high-Ca (n = 10), B: high-phytate/high-Ca (n = 10) and C: high-phytate/low-Ca (n = 11). Each individual received the same meal type at three different occasions with 0, 250 and 1000 mg CPP added. CPP had no effect on Zn absorption: A: 14.3 +/- 4.4% (mean +/- SD) (0 mg CPP), 16.7 +/- 6.6% (250 mg CPP) and 16.0 +/- 8.8% (1000 mg CPP); B: 7.0 +/- 1.6%, 7.7 +/- 3.0% and 8.0 +/- 2.6%; C: 7.7 +/- 2.5%, 7.0 +/- 2.3% and 6.5 +/- 1.6%, respectively. Addition of 1000 mg CPP reduced fractional Ca absorption from meal A: 33.8 +/- 7...Continue Reading

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Citations

Aug 2, 2002·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·Kerstin FredlunAnn-Sofie Sandberg
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