矿物元素蛋白盐的生物利用率

Bioavailability of Metal Proteinates

经SD品系的大白鼠试验证明 ,钙锌蛋白盐的生物利用率显著高于氨基酸配合物和无机盐 .蛋白盐能显著地提高股骨密度 (p <0 .0 5)以及股骨钙和血清钙含量 ,并能显著地提高血清锌含量 (p <0 .0 1 )以及股骨锌和脑锌含量 ,但氨基酸锌和无机锌的利用率差异不显著 ,说明小肽是一种比游离氨基酸更好的蛋白盐配体 .

Sprague Dawley rats were used to evaluate the bioavailability of Ca and Zn in metal proteinate, metal amino acid complexes and inorganic salts. The Ca bioavailability of Ca proteinate was higher than that of Ca amino acid complexes and inorganic salts based on the thighbone density (p< 0.05 ) and thighbone or serum Ca concentrations. The rats fed with metal proteinate had a higher serum Zn content (p<0.01) than the rats fed with amino acid complexes or inorganic salts. There were no differences in serum and tissue Zn content between the rats fed with amino acid complexes and the rats fed with inorganic salts. The Zn proteinate can increase Zn content in thighbone and brain more than Zn amino acid complexes.