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The amount of calcium absorbed from calcium citrate
supplements is consistently higher than the amount absorbed from calcium
carbonate supplements. This difference is important because women who
take calcium supplements that are poorly absorbed are not as well protected
against calcium-related bone loss and possible osteoporosis. The researchers
pooled data from 15 previously published studies in which men and women
took either calcium citrate or calcium carbonate supplements. Calcium
citrate is better absorbed than calcium carbonate by about 25%, whether
it is taken on an empty stomach or given with meals.
American Journal of Therapeutics
November 1999;6:303-311,313-321.
Journal of Clinical Pharmacology
December 1999;39:1-4.
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