Calcium, Vitamin D, and Parathyroid Hormone Status in Young White and Black Women: Association with Racial Differences in Bone Mass

摘要: The etiology of the racial disparity in bone mass and fracture rate is unknown. Since PTH-vitamin D endocrine system a major regulator calcium metabolism turnover, this cross-sectional study examined relationship radial lumbar density to vitamin metabolite PTH concentrations intake excretion 67 white 70 black highly comparable, healthy, premenopausal women. Bone at both sites was higher blacks than whites. Serum 25-hydroxyvitamin slightly but not statistically significantly (P = 0.08), lower whites, there were no differences 1,25-dihydroxyvitamin D, PTH, or renal tubular maximum for reabsorption phosphate. mean concentration well within normal range associated with evidence secondary hyperparathyroidism. There correlations concentrations. Although ...