Article

Access to the text (HTML) Access to the text (HTML)
PDF Access to the PDF text
Advertising


Access to the full text of this article requires a subscription.
  • If you are a subscriber, please sign in 'My Account' at the top right of the screen.

  • If you want to subscribe to this journal, see our rates

  • You can purchase this item in Pay Per ViewPay per View - FAQ : 33,00 € Taxes included to order
    Pages Iconography Videos Other
    10 0 0 0


Nutrition clinique et métabolisme
Volume 14, n° 3
pages 206-215 (septembre 2000)
Doi : S0985-0562(00)80024-2
Le bilan calcique : besoins, apports, biodisponibilité
Calcium balance: requirements, intake and bioavailability
 

Léon Guéguen
 Laboratoire de nutrition et sécurité alimentaire, INRA, 78352 Jouy-en-Josas cedex, France 

Résumé

Le nombre de fractures osseuses et le coût socio-économique de l'ostéoporose devraient tripler avant un demi-siècle. Un apport alimentaire suffisant de calcium, conforme aux apports nutritionnels conseillés (ANC) récemment révisés, est indéniablement l'un des facteurs importants de prévention primaire (acquisition du capital osseux) et secondaire (réduction de la perte osseuse). De 50 à 75 % des adolescentes, des femmes ménopausées et des personnes âgées ne consomment pas assez de calcium et constituent des groupes à risque élevé. Plus des deux tiers du calcium consommé provient du lait et des produits laitiers. Bien que la biodisponibilité du calcium du lait ne dépasse pas 35–40 %, comme celle des meilleurs sels calciques, son absorption intestinale est protégée par des ligands organiques. Le lipides saturés ne nuisent pas à l'absorption du calcium par la formation de savons insolubles. Le calcium des végétaux riches en phytates ou en oxalates est moins disponible. La rétention osseuse du calcium absorbé est favorisée par l'effet repas et l'absorption simultanée de phosphore, ce qui est assuré par les produits laitiers, et défavorisée par un excès de protéines, de sodium ou de sulfates. La consommation régulière d'aliments riches en calcium, notamment de produits laitiers, devrait être encouragée chez les adolescentes et les personnes âgées dans le but de prévenir à long terme ou de limiter les conséquences de l'ostéoporose.

The full text of this article is available in PDF format.
Summary

The number of bone fractures and the socio-economic cost of osteoporosis should triple within the next fifty years. A sufficient dietary intake of calcium, abiding to the recently revised recommended daily allowances (RDA), is one of the most important factors of primary (acquiring of bone capital) and secondary (decrease of bone loss) prevention. Between 50 and 75% of adolescents, menopaused women and elderly persons do not consume enough calcium and therefore constitute high risk groups. More than 2/3 of the calcium eaten comes from milk and dairy products. Even though the bioavailability of calcium from milk is no higher than 35 to 40%, as is the bioavailability of calcium from inorganic or organic salts, organic ligands protect it during intestinal absorption. Saturated lipids do not interfere with calcium absorption via the formation of insoluble soaps. The calcium from vegetables rich in phytates or oxalates is less available. Bone retention of absorbed calcium is increased by the meal effect and the simultaneous absorption of phosphorus (which is guaranteed by dairy products), and decreased by excess protein, sodium or sulphate intake. The regular consumption of foods rich in calcium, notably dairy products, should be encouraged for adolescents and the elderly in order to prevent, on the long run, or to limit the consequences of osteoporosis.

The full text of this article is available in PDF format.

Keyword : calcium, ostéoporose

Keywords : calcium, osteoporosis




© 2000  Published by Elsevier Masson SAS.
EM-CONSULTE.COM is registrered at the CNIL, déclaration n° 1286925.
As per the Law relating to information storage and personal integrity, you have the right to oppose (art 26 of that law), access (art 34 of that law) and rectify (art 36 of that law) your personal data. You may thus request that your data, should it be inaccurate, incomplete, unclear, outdated, not be used or stored, be corrected, clarified, updated or deleted.
Personal information regarding our website's visitors, including their identity, is confidential.
The owners of this website hereby guarantee to respect the legal confidentiality conditions, applicable in France, and not to disclose this data to third parties.
Close
Article Outline
You can move this window by clicking on the headline
@@#110903@@