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http://dx.doi.org/10.3746/jkfn.2006.35.7.853

Effect of Types of Egg Shell Calcium Salts and Egg Shell Membrane on Calcium Metabolism in Rats  

Noh, Kyung-Hee (School of Food and Life Sciences, Food Science Institute, and Biohealth Product Research Center, Inje University)
Lee, Sang-Hyun (School of Food and Life Sciences, Food Science Institute, and Biohealth Product Research Center, Inje University)
Ma, Jie (School of Food and Life Sciences, Food Science Institute, and Biohealth Product Research Center, Inje University)
Zhou, Yusi (School of Food and Life Sciences, Food Science Institute, and Biohealth Product Research Center, Inje University)
Kim, Jae-Cherl (School of Food and Life Sciences, Food Science Institute, and Biohealth Product Research Center, Inje University)
Kim, Myo-Jeong (School of Food and Life Sciences, Food Science Institute, and Biohealth Product Research Center, Inje University)
Song, Young-Sun (School of Food and Life Sciences, Food Science Institute, and Biohealth Product Research Center, Inje University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.35, no.7, 2006 , pp. 853-859 More about this Journal
Abstract
This study was carried out to investigate the effect of egg shell calcium salt types and egg shell membrane on calcium metabolism in rats. Sprague-Dawley male rats, 4 weeks of age, were fed on free-calcium diets for 2 weeks after adjustment period. Rats weighing approximately $247{\pm}2.3g$ were divided into 6 groups and were fed on the experimental diets containing 0.2% calcium for 4 weeks. Experimental groups were as follows; {ES(M+)} (egg shell powder diet with egg shell membrane), {ES(M-)} (egg shell powder diet without egg shell membrane), {AC(M+)} (egg shell calcium acetate diet with egg shell membrance), {AC(M-)} (egg shell calcium acetate diet without eg shell membrane), {GC(M+)} (egg shell calcium glucuronate diet with egg shell membrane) and {GC(M-)} (egg shell calcium glucuronate diet without egg shell membrane). Bone length of femur was significantly different by the types (p<0.05) of egg shell calcium salts. Bone mineral density of femur showed the highest level in AC(M-) group. Calcium content of femur and calcium absorption rate were higher in egg shell calcium salt groups than in eg shell powder groups. Calcium absorption rate and retention were significantly different (p<0.05) among the types of eg shell calcium salts and were higher in the AC(M-) group than in the other groups. Alkaline phosphatase activity, parathyroid hormone and osteocalcin levels of serum showed no significant difference among the experimental groups. From the above results, it is concluded that bioavailability of calcium is higher in groups of egg shell calcium salts compared to those in egg shell powder, even though egg shell membrane has no effect on calcium metabolism. Thus, these findings suggest the possibility of using egg shell calcium salts as a functional food material related to calcium metabolism.
Keywords
calcium metabolism; egg shell powder; calcium salts; egg shell membrane;
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Times Cited By KSCI : 2  (Citation Analysis)
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