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Related Experiment Videos

Does calcium supplementation prevent postmenopausal bone loss? A double-blind, controlled clinical study.

B Riis, K Thomsen, C Christiansen

    The New England Journal of Medicine
    |January 22, 1987
    PubMed
    Summary

    Calcium supplements did not prevent bone loss in early postmenopausal women. Estrogen therapy was more effective than calcium for preventing bone mineral density loss.

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    Area of Science:

    • Endocrinology
    • Bone Metabolism
    • Gerontology

    Background:

    • Postmenopausal bone loss is a significant health concern.
    • Estrogen deficiency leads to accelerated bone resorption.
    • Effective interventions are crucial for preventing osteoporosis.

    Purpose of the Study:

    • To compare the efficacy of calcium supplementation versus estrogen therapy in preventing early postmenopausal bone loss.
    • To evaluate the effects of calcium on cortical and trabecular bone loss.

    Main Methods:

    • A two-year randomized controlled trial involving 43 early postmenopausal women.
    • Treatment groups included percutaneous 17 beta-estradiol (with progesterone), oral calcium (2000 mg/day), and placebo.
    • Bone mineral content was measured using single-photon and dual-photon absorptiometry.

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    Main Results:

    • Estrogen therapy maintained bone mineral content in the forearm, total body, and spine.
    • Both calcium and placebo groups showed significant decreases in bone mineral content.
    • Calcium supplementation showed a trend towards slowing cortical bone loss but no effect on trabecular bone loss.

    Conclusions:

    • Calcium supplementation (2000 mg/day) was less effective than estrogen therapy for preventing early postmenopausal bone loss.
    • Calcium may offer a minor benefit for cortical bone preservation but does not impact trabecular bone loss.
    • Estrogen therapy remains a more effective intervention for early postmenopausal bone loss prevention.