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Calcium supplementation and postmenopausal bone loss.

L Nilas, C Christiansen, P Rødbro

    British Medical Journal (Clinical Research Ed.)
    |October 27, 1984
    PubMed
    Summary
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    Calcium supplementation does not prevent bone loss in early postmenopausal women. Daily calcium intake, even up to 1150 mg, was ineffective in preventing bone mineral density decline over two years.

    Area of Science:

    • Osteoporosis Research
    • Nutritional Science
    • Menopause Studies

    Background:

    • Bone loss is a significant concern for postmenopausal women.
    • Dietary calcium intake is believed to play a role in bone health.
    • Optimal calcium intake for preventing bone loss during early menopause is debated.

    Purpose of the Study:

    • To investigate the effect of varying dietary calcium intakes combined with supplementation on bone mineral content in early postmenopausal women.
    • To determine if a daily calcium supplement of 500 mg can mitigate bone loss in this demographic.

    Main Methods:

    • 103 early postmenopausal women were assessed for dietary calcium intake (categorized into <550 mg/day, 550-1150 mg/day, >1150 mg/day).
    • Participants received a daily 500 mg calcium supplement for two years.

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  • Bone mineral content was measured every three months to estimate bone calcium balance.

    • Main Results:

    • All three dietary calcium intake groups exhibited a comparable rate of bone mineral content decline over the two-year study period.
    • The addition of a 500 mg daily calcium supplement did not significantly alter the rate of bone loss.
    • This suggests that neither the dietary intake nor the supplementation effectively prevented bone loss.

    Conclusions:

    • A total daily calcium intake of 1000-2000 mg (dietary plus supplemental) is insufficient to prevent bone loss in women during early menopause.
    • Further research into effective strategies for bone loss prevention in this population is warranted.
    • Dietary calcium intake alone or with moderate supplementation may not be adequate to counteract menopausal bone resorption.