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pubmed-article:9625104pubmed:abstractTextWe studied the biochemical effects of calcium supplementation during a 2-mo course in postmenopausal women (x +/- SD: 64 +/- 5 y of age and 14.5 +/- 6.7 y since menopause). The effects on calcium homeostasis and bone remodeling were assessed after 1 and 2 mo of daily administration of either calcium carbonate (1200 mg elemental Ca/d, n = 60) or a placebo (n = 56). The daily dietary calcium intake assessed before the beginning of calcium supplementation was 786 mg/d. We found a significant inverse relation between baseline intact parathyroid hormone (iPTH) and dietary calcium intake before supplementation (r = -0.48, P = 0.0002). A significant increase in urinary excretion of pyridinoline was observed when the dietary calcium intake was lower than the median value. Calcium supplementation resulted in a significant increase in 24-h urinary calcium (39%, P < 0.02) and a significant reduction of bone alkaline phosphatase at 2 mo and of all bone-resorption markers (hydroxyproline, pyridinoline, and deoxypyridinoline) at I and 2 mo without significant changes in 44-68 PTH fragments or iPTH concentrations. When the dietary calcium intake was low (mean +/- SD: 576 +/- 142 mg/d), calcium supplementation was responsible for a greater increase in urinary calcium excretion and a greater decrease in markers of bone turnover. The greatest variations were observed for deoxypyridinoline at 1 and 2 mo (-18.5%, P < 0.05) and for pyridinoline at 1 mo (-16.3%, P < 0.01). Two months of calcium supplementation in postmenopausal women was efficient in reducing markers of bone turnover, with a greater effect in women with a low dietary calcium intake.lld:pubmed
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pubmed-article:9625104pubmed:volume67lld:pubmed
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pubmed-article:9625104pubmed:pagination1273-8lld:pubmed
pubmed-article:9625104pubmed:dateRevised2006-11-15lld:pubmed
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pubmed-article:9625104pubmed:year1998lld:pubmed
pubmed-article:9625104pubmed:articleTitleBiochemical effects of calcium supplementation in postmenopausal women: influence of dietary calcium intake.lld:pubmed
pubmed-article:9625104pubmed:affiliationDepartment of Rheumatology, CHU, Amiens, France.lld:pubmed
pubmed-article:9625104pubmed:publicationTypeJournal Articlelld:pubmed
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pubmed-article:9625104pubmed:publicationTypeRandomized Controlled Triallld:pubmed
pubmed-article:9625104pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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