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Calcium requirement and calcium therapy.

B E Nordin, A Horsman, D H Marshall

    Clinical Orthopaedics and Related Research
    |May 1, 1979
    PubMed
    Summary

    The average adult calcium requirement is 578 mg daily, with 900 mg recommended for 95% of individuals. Calcium intake is crucial for bone health, especially after menopause, to prevent osteoporosis and bone loss.

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    Bone densitometry in clinical practice: longitudinal measurements at three sites in postmenopausal women on five treatments.

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    Area of Science:

    • Nutritional Science
    • Bone Metabolism
    • Gerontology

    Background:

    • Calcium is vital for physiological functions, with plasma levels maintained at the skeleton's expense during deficiency.
    • Menopause is associated with increased calcium requirements and bone loss.

    Purpose of the Study:

    • To estimate the mean calcium requirement for normal adults.
    • To determine the calcium allowance for 95% of adults.
    • To investigate calcium's role in postmenopausal bone health.

    Main Methods:

    • Calcium balance studies were conducted on 84 normal subjects.
    • Analysis of calcium, phosphorus, and magnesium requirements and their impact on plasma levels.
    • Evaluation of calcium and vitamin D supplementation effects on postmenopausal bone loss.

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    Main Results:

    • The mean calcium requirement was estimated at 578 mg, with a recommended allowance of 900 mg for 95% of adults.
    • Calcium deficiency impacts the skeleton more severely than phosphorus or magnesium deficiency.
    • Calcium supplementation, with or without vitamin D, effectively reduced postmenopausal bone loss, height loss, and vertebral compression.

    Conclusions:

    • Adequate calcium intake is essential for maintaining adult calcium balance and bone health.
    • Calcium supplementation is beneficial in preventing and managing postmenopausal bone loss and osteoporosis.
    • Vitamin D alone is insufficient for correcting negative calcium balance or preventing bone loss in postmenopausal women.