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Phosphate and carbonate salts of calcium support robust bone building in osteoporosis
- Source :
- The American Journal of Clinical Nutrition. 92:101-105
- Publication Year :
- 2010
- Publisher :
- Elsevier BV, 2010.
-
Abstract
- Background: Calcium is an essential cotherapy in osteoporosis treatment. The relative effectiveness of various calcium salts for this purpose is uncertain. Many older women with osteoporosis have phosphorus intakes of ,70% of the Recommended Dietary Allowance. Objective: Our objective was to test the hypothesis that calcium phosphate would better support anabolic bone building than would calcium carbonate. Design: This study was a 12-mo, randomized, positive-comparator, 2-arm, single-blind clinical trial in 211 patients treated with teriparatide who consumed ,1000 mg phosphorus/d. Participants were randomly assigned to receive, in addition to teriparatide and 1000 IU cholecalciferol, 1800 mg calcium/d as either tricalcium phosphate or calcium carbonate. The primary endpoints were changes in lumbar spine and total hip bone mineral densities (BMDs); secondary endpoints were changes in bone resorption biomarkers and serum and urine calcium and phosphorus concentrations. Results: In the combined group, the lumbar spine BMD increased by 7.2%, and total hip BMD increased by 2.1% (P , 0.01 for both). However, there was no significant difference between calcium-treatment groups, and there were no significant between-group differences in serum calcium and phosphorus concentrations or in urine calcium concentrations. Bone resorption biomarkers increased in both groups, as expected with teriparatide, but the increases in the 2 calcium groups did not differ significantly. Conclusions: Tricalcium phosphate and calcium carbonate appear to be approximately equally effective in supporting bone building with a potent anabolic agent; phosphate salt may be preferable in patients with restricted phosphorus intakes. This trial was registered at clinicaltrials.gov as NCT00074711. Am J Clin Nutr doi: 10. 3945/ajcn.2009.29085.
- Subjects :
- Bone mineral
medicine.medical_specialty
Nutrition and Dietetics
business.industry
Phosphorus
Osteoporosis
Urine Calcium Measurement
Medicine (miscellaneous)
chemistry.chemical_element
Calcium
medicine.disease
Bone resorption
Endocrinology
Blood serum
chemistry
Internal medicine
Teriparatide
Medicine
business
medicine.drug
Subjects
Details
- ISSN :
- 00029165
- Volume :
- 92
- Database :
- OpenAIRE
- Journal :
- The American Journal of Clinical Nutrition
- Accession number :
- edsair.doi...........ab69813ec5fd42b4bd412d7775e9cc90