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Related Experiment Videos

Calcium supplements: practical considerations.

R P Heaney

    Osteoporosis International : a Journal Established As Result of Cooperation Between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA
    |February 1, 1991
    PubMed
    Summary
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    For optimal calcium supplement absorption, take divided doses with meals and at bedtime. Individual absorption varies, so assessing intake fraction is crucial for effective supplementation.

    Area of Science:

    • Nutritional Science
    • Pharmacokinetics
    • Clinical Medicine

    Background:

    • Dietary calcium is preferred, but supplements are often needed to achieve adequate intake.
    • Calcium absorption is significantly enhanced by a divided dosing regimen (4x/d) compared to a single daily dose (1x/d).

    Discussion:

    • The chemical solubility of calcium supplements has minimal impact on absorption; poorly soluble forms like calcium carbonate are absorbed effectively when taken with meals.
    • Gastric acid is not essential for the absorption of even poorly soluble calcium preparations if consumed with food.

    Key Insights:

    • Individual calcium absorption efficiency varies widely among patients, necessitating personalized dosage assessments.
    • Divided dosing significantly improves calcium supplement absorption compared to single daily doses.

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  • Calcium carbonate absorption is comparable or superior to more soluble salts, irrespective of solubility.

    • Outlook:

    • Future research should focus on developing personalized strategies for calcium supplementation based on individual absorption rates.
    • Understanding patient-specific absorption variability is key to optimizing therapeutic outcomes and preventing deficiencies.
    • Establishing baseline absorption fractions can guide effective and safe calcium supplementation regimens for diverse patient populations.