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KMID : 0438419970040010025
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Korean Journal of Bone Metabolism
1997 Volume.4 No. 1 p.25 ~ p.34
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The Effects of Bovine Bone Ash, Milk Calcium and Calcium Product as a Dietary Calcium Source on Mineral Bioavailability in Rats
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Seo Kang
Yang Seoung-Oh
Choi Chang-Won
Lee Eung-Seo
Shin Sang-Ki
Chae Jung-Yeon
Kang Shin-Wook
Yeo Ik-Hyun
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Abstract
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The effects of milk calcium, bovine bone ash and a calcium (Ca) product were evaluated after inducing ostepenia in the rat by feeding Ca-deficient diet for four weeks. The modeling design involved the three week-old female SD-strain rats fed Ca-deficient diet (20% casein, 0.04% Ca and 0.41% P)for four weeks. The rats were divided into four groups, one was fed the Ca-deficient diet(Ca-free), and the rest were fed three kinds of Ca-supplemental diets (20% protein 0.5% Ca. 0.5% P)for four weeks. The Ca-supplemental diets contained three kinds of Ca source, milk calcium. bovine bone ash or calcium product. After raised, bone minral density, breaking force and calcium content of the femur and tibia of rats in each group were determined. The results are as follows;
1. The body weight in Ca-free group was remarkably lower than those in normal diet group and Ca-supplementary groups(p<0.05). Among Ca-supplementary groups, the final body weight and food efficient ratio were highest in Ca product(and then bovine bone ash, milk Ca).
2. After autoclaving(121degreesC, 1.5atm, 1hr)procedure, specimens of the femur and tibia in Ca-free group was breaked easily, but deformation was not observed in normal diet group.
3. The bone mineral density (BMD)and breaking force of femur and tibia in Ca-free group was remarkably lower than those in normal diet group and Ca-supplementary groups (p<0.05). In Ca-supplementary group, BMD and breaking force of the frmur and tibia were highest in Ca product(and than bovine bone ash, milk Ca).
4. The Ca content of bone in Ca-free group was remarkably lower than those in
normal diet group and Ca-supplementary groups(p<0.05).In Ca-supplementary groups the Ca content of bone was the highest in Ca product (and then bovine bone ash, milk Ca).
In conclusion, bovine born ash and Ca product were more effective than milk calcium in Ca bioavailability and recovery from osteopenic condition.
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